(3x+11)(4x-5)=180

Simple and best practice solution for (3x+11)(4x-5)=180 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for (3x+11)(4x-5)=180 equation:


Simplifying
(3x + 11)(4x + -5) = 180

Reorder the terms:
(11 + 3x)(4x + -5) = 180

Reorder the terms:
(11 + 3x)(-5 + 4x) = 180

Multiply (11 + 3x) * (-5 + 4x)
(11(-5 + 4x) + 3x * (-5 + 4x)) = 180
((-5 * 11 + 4x * 11) + 3x * (-5 + 4x)) = 180
((-55 + 44x) + 3x * (-5 + 4x)) = 180
(-55 + 44x + (-5 * 3x + 4x * 3x)) = 180
(-55 + 44x + (-15x + 12x2)) = 180

Combine like terms: 44x + -15x = 29x
(-55 + 29x + 12x2) = 180

Solving
-55 + 29x + 12x2 = 180

Solving for variable 'x'.

Reorder the terms:
-55 + -180 + 29x + 12x2 = 180 + -180

Combine like terms: -55 + -180 = -235
-235 + 29x + 12x2 = 180 + -180

Combine like terms: 180 + -180 = 0
-235 + 29x + 12x2 = 0

Begin completing the square.  Divide all terms by
12 the coefficient of the squared term: 

Divide each side by '12'.
-19.58333333 + 2.416666667x + x2 = 0

Move the constant term to the right:

Add '19.58333333' to each side of the equation.
-19.58333333 + 2.416666667x + 19.58333333 + x2 = 0 + 19.58333333

Reorder the terms:
-19.58333333 + 19.58333333 + 2.416666667x + x2 = 0 + 19.58333333

Combine like terms: -19.58333333 + 19.58333333 = 0.00000000
0.00000000 + 2.416666667x + x2 = 0 + 19.58333333
2.416666667x + x2 = 0 + 19.58333333

Combine like terms: 0 + 19.58333333 = 19.58333333
2.416666667x + x2 = 19.58333333

The x term is 2.416666667x.  Take half its coefficient (1.208333334).
Square it (1.460069446) and add it to both sides.

Add '1.460069446' to each side of the equation.
2.416666667x + 1.460069446 + x2 = 19.58333333 + 1.460069446

Reorder the terms:
1.460069446 + 2.416666667x + x2 = 19.58333333 + 1.460069446

Combine like terms: 19.58333333 + 1.460069446 = 21.043402776
1.460069446 + 2.416666667x + x2 = 21.043402776

Factor a perfect square on the left side:
(x + 1.208333334)(x + 1.208333334) = 21.043402776

Calculate the square root of the right side: 4.587308882

Break this problem into two subproblems by setting 
(x + 1.208333334) equal to 4.587308882 and -4.587308882.

Subproblem 1

x + 1.208333334 = 4.587308882 Simplifying x + 1.208333334 = 4.587308882 Reorder the terms: 1.208333334 + x = 4.587308882 Solving 1.208333334 + x = 4.587308882 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.208333334' to each side of the equation. 1.208333334 + -1.208333334 + x = 4.587308882 + -1.208333334 Combine like terms: 1.208333334 + -1.208333334 = 0.000000000 0.000000000 + x = 4.587308882 + -1.208333334 x = 4.587308882 + -1.208333334 Combine like terms: 4.587308882 + -1.208333334 = 3.378975548 x = 3.378975548 Simplifying x = 3.378975548

Subproblem 2

x + 1.208333334 = -4.587308882 Simplifying x + 1.208333334 = -4.587308882 Reorder the terms: 1.208333334 + x = -4.587308882 Solving 1.208333334 + x = -4.587308882 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.208333334' to each side of the equation. 1.208333334 + -1.208333334 + x = -4.587308882 + -1.208333334 Combine like terms: 1.208333334 + -1.208333334 = 0.000000000 0.000000000 + x = -4.587308882 + -1.208333334 x = -4.587308882 + -1.208333334 Combine like terms: -4.587308882 + -1.208333334 = -5.795642216 x = -5.795642216 Simplifying x = -5.795642216

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.378975548, -5.795642216}

See similar equations:

| w-16=20 | | x^2-75x+325=0 | | 6500=5000(7.5)t | | y^4-23y^2-70=0 | | 2x-15x=3 | | ln(4x^2)=10 | | 800=x*.05*9 | | 2x+-1=x+4 | | 8x+15y=75 | | 1000=1150*x*3 | | 7z=6 | | 2x+8=4x+6 | | 4t-t+9=27 | | 4252=1800(r)4.5 | | 87.75=x*.045*3 | | 4t-t+9=97 | | 2m+15=7 | | 546=x*.05*2 | | 546=x*.05*2 | | n=0.25*60 | | 2.3t=4.6 | | 5425=15500(8.75)t | | -z^2+2z-1=0 | | 63.05=x*.0325*2 | | -15+7h=48 | | 828.75=p(6.5)1.5 | | 3x^4-12x^3+3x^2+36x-36=0 | | (3x-4)(3x-4)=25 | | X^5-Y^8=3 | | 4x+5-7x=1 | | 12.99=50.50 | | 6(3.2x-2.3)=7.2x-13.32 |

Equations solver categories