45+15=x(3+x)

Simple and best practice solution for 45+15=x(3+x) 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 45+15=x(3+x) equation:


Simplifying
45 + 15 = x(3 + x)

Combine like terms: 45 + 15 = 60
60 = x(3 + x)
60 = (3 * x + x * x)
60 = (3x + x2)

Solving
60 = 3x + x2

Solving for variable 'x'.

Reorder the terms:
60 + -3x + -1x2 = 3x + -3x + x2 + -1x2

Combine like terms: 3x + -3x = 0
60 + -3x + -1x2 = 0 + x2 + -1x2
60 + -3x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
60 + -3x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-60 + 3x + x2 = 0

Move the constant term to the right:

Add '60' to each side of the equation.
-60 + 3x + 60 + x2 = 0 + 60

Reorder the terms:
-60 + 60 + 3x + x2 = 0 + 60

Combine like terms: -60 + 60 = 0
0 + 3x + x2 = 0 + 60
3x + x2 = 0 + 60

Combine like terms: 0 + 60 = 60
3x + x2 = 60

The x term is 3x.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3x + 2.25 + x2 = 60 + 2.25

Reorder the terms:
2.25 + 3x + x2 = 60 + 2.25

Combine like terms: 60 + 2.25 = 62.25
2.25 + 3x + x2 = 62.25

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 62.25

Calculate the square root of the right side: 7.889866919

Break this problem into two subproblems by setting 
(x + 1.5) equal to 7.889866919 and -7.889866919.

Subproblem 1

x + 1.5 = 7.889866919 Simplifying x + 1.5 = 7.889866919 Reorder the terms: 1.5 + x = 7.889866919 Solving 1.5 + x = 7.889866919 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = 7.889866919 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 7.889866919 + -1.5 x = 7.889866919 + -1.5 Combine like terms: 7.889866919 + -1.5 = 6.389866919 x = 6.389866919 Simplifying x = 6.389866919

Subproblem 2

x + 1.5 = -7.889866919 Simplifying x + 1.5 = -7.889866919 Reorder the terms: 1.5 + x = -7.889866919 Solving 1.5 + x = -7.889866919 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = -7.889866919 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -7.889866919 + -1.5 x = -7.889866919 + -1.5 Combine like terms: -7.889866919 + -1.5 = -9.389866919 x = -9.389866919 Simplifying x = -9.389866919

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.389866919, -9.389866919}

See similar equations:

| x/5-3/5 | | 10+x+2x=40 | | 2t-7=27 | | 2y^2-1=149 | | 4(x-20)=286 | | m(x)=7220+50x | | 7+49=7(x+7) | | 5a+3=-92 | | (3x+3)=45 | | 96x+2=3-80 | | 3x^2-38x-59=0 | | 5x+8+6x=63 | | 15x-8=-3y | | 96x+2=3-80x | | -8=2+2x | | -7-11n=37 | | 9*(5/6y-5)^ | | 63+x=9(7+6) | | 96+2=3-80 | | x+(-14)=-25 | | -7n-9=-128 | | 0.25X=0.35X | | 2x^2-5xy-3y^2= | | sqrt(-x^2+6x-5)=8-2x | | K+K=18 | | 7*x=280 | | 2x-3(4x-3)=-11 | | 96+2=3+80 | | 9x(5/6y-5)^ | | -6p+11=149 | | 7s=3+6s | | 8f+10=3f |

Equations solver categories