(4x-1)(x+2)=4

Simple and best practice solution for (4x-1)(x+2)=4 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 (4x-1)(x+2)=4 equation:


Simplifying
(4x + -1)(x + 2) = 4

Reorder the terms:
(-1 + 4x)(x + 2) = 4

Reorder the terms:
(-1 + 4x)(2 + x) = 4

Multiply (-1 + 4x) * (2 + x)
(-1(2 + x) + 4x * (2 + x)) = 4
((2 * -1 + x * -1) + 4x * (2 + x)) = 4
((-2 + -1x) + 4x * (2 + x)) = 4
(-2 + -1x + (2 * 4x + x * 4x)) = 4
(-2 + -1x + (8x + 4x2)) = 4

Combine like terms: -1x + 8x = 7x
(-2 + 7x + 4x2) = 4

Solving
-2 + 7x + 4x2 = 4

Solving for variable 'x'.

Reorder the terms:
-2 + -4 + 7x + 4x2 = 4 + -4

Combine like terms: -2 + -4 = -6
-6 + 7x + 4x2 = 4 + -4

Combine like terms: 4 + -4 = 0
-6 + 7x + 4x2 = 0

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

Divide each side by '4'.
-1.5 + 1.75x + x2 = 0

Move the constant term to the right:

Add '1.5' to each side of the equation.
-1.5 + 1.75x + 1.5 + x2 = 0 + 1.5

Reorder the terms:
-1.5 + 1.5 + 1.75x + x2 = 0 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + 1.75x + x2 = 0 + 1.5
1.75x + x2 = 0 + 1.5

Combine like terms: 0 + 1.5 = 1.5
1.75x + x2 = 1.5

The x term is 1.75x.  Take half its coefficient (0.875).
Square it (0.765625) and add it to both sides.

Add '0.765625' to each side of the equation.
1.75x + 0.765625 + x2 = 1.5 + 0.765625

Reorder the terms:
0.765625 + 1.75x + x2 = 1.5 + 0.765625

Combine like terms: 1.5 + 0.765625 = 2.265625
0.765625 + 1.75x + x2 = 2.265625

Factor a perfect square on the left side:
(x + 0.875)(x + 0.875) = 2.265625

Calculate the square root of the right side: 1.505199322

Break this problem into two subproblems by setting 
(x + 0.875) equal to 1.505199322 and -1.505199322.

Subproblem 1

x + 0.875 = 1.505199322 Simplifying x + 0.875 = 1.505199322 Reorder the terms: 0.875 + x = 1.505199322 Solving 0.875 + x = 1.505199322 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.875' to each side of the equation. 0.875 + -0.875 + x = 1.505199322 + -0.875 Combine like terms: 0.875 + -0.875 = 0.000 0.000 + x = 1.505199322 + -0.875 x = 1.505199322 + -0.875 Combine like terms: 1.505199322 + -0.875 = 0.630199322 x = 0.630199322 Simplifying x = 0.630199322

Subproblem 2

x + 0.875 = -1.505199322 Simplifying x + 0.875 = -1.505199322 Reorder the terms: 0.875 + x = -1.505199322 Solving 0.875 + x = -1.505199322 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.875' to each side of the equation. 0.875 + -0.875 + x = -1.505199322 + -0.875 Combine like terms: 0.875 + -0.875 = 0.000 0.000 + x = -1.505199322 + -0.875 x = -1.505199322 + -0.875 Combine like terms: -1.505199322 + -0.875 = -2.380199322 x = -2.380199322 Simplifying x = -2.380199322

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.630199322, -2.380199322}

See similar equations:

| 7.4=-2.7(2+3.2) | | 4x+8-6x-5=20 | | 2.66666667c-2=0.66666667c-12 | | 4x+95-25x=-8 | | (3n+-2)(4n+1)= | | 4x+19-25x=-8 | | 25=40a | | (4f+4)(3f+-1)= | | 25=9x-14x | | (4j+-4)(j+1)= | | 7/8÷32= | | 3x-3=2y | | 6x^4-25x^3-28x^2+10x+12=0 | | (2s+-4)(3s+-4)= | | f(0)=4x^2+2x-4 | | (3m+4)(m+2)= | | 72=w | | (-4/15a^3):(-2/3a)^2 | | (3s+-3)(2s+1)= | | 7/8÷32 | | (m+-4)(4m+-2)= | | 20x+113=17 | | 4x^2-134x=570 | | 2q+5-(a-7)=48 | | 24+.99t=1.49t | | 66=-6-6(3x-6) | | 8(8-6n)=352 | | (4t+1)(t+-3)= | | .99t=24-1.49t | | -161=-7(4n-1) | | -3(-2+8v)=198 | | 11*-13= |

Equations solver categories