x(x-4)-7=3x+(2+x)2

Simple and best practice solution for x(x-4)-7=3x+(2+x)2 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 x(x-4)-7=3x+(2+x)2 equation:


Simplifying
x(x + -4) + -7 = 3x + (2 + x) * 2

Reorder the terms:
x(-4 + x) + -7 = 3x + (2 + x) * 2
(-4 * x + x * x) + -7 = 3x + (2 + x) * 2
(-4x + x2) + -7 = 3x + (2 + x) * 2

Reorder the terms:
-7 + -4x + x2 = 3x + (2 + x) * 2

Reorder the terms for easier multiplication:
-7 + -4x + x2 = 3x + 2(2 + x)
-7 + -4x + x2 = 3x + (2 * 2 + x * 2)
-7 + -4x + x2 = 3x + (4 + 2x)

Reorder the terms:
-7 + -4x + x2 = 4 + 3x + 2x

Combine like terms: 3x + 2x = 5x
-7 + -4x + x2 = 4 + 5x

Solving
-7 + -4x + x2 = 4 + 5x

Solving for variable 'x'.

Reorder the terms:
-7 + -4 + -4x + -5x + x2 = 4 + 5x + -4 + -5x

Combine like terms: -7 + -4 = -11
-11 + -4x + -5x + x2 = 4 + 5x + -4 + -5x

Combine like terms: -4x + -5x = -9x
-11 + -9x + x2 = 4 + 5x + -4 + -5x

Reorder the terms:
-11 + -9x + x2 = 4 + -4 + 5x + -5x

Combine like terms: 4 + -4 = 0
-11 + -9x + x2 = 0 + 5x + -5x
-11 + -9x + x2 = 5x + -5x

Combine like terms: 5x + -5x = 0
-11 + -9x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '11' to each side of the equation.
-11 + -9x + 11 + x2 = 0 + 11

Reorder the terms:
-11 + 11 + -9x + x2 = 0 + 11

Combine like terms: -11 + 11 = 0
0 + -9x + x2 = 0 + 11
-9x + x2 = 0 + 11

Combine like terms: 0 + 11 = 11
-9x + x2 = 11

The x term is -9x.  Take half its coefficient (-4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
-9x + 20.25 + x2 = 11 + 20.25

Reorder the terms:
20.25 + -9x + x2 = 11 + 20.25

Combine like terms: 11 + 20.25 = 31.25
20.25 + -9x + x2 = 31.25

Factor a perfect square on the left side:
(x + -4.5)(x + -4.5) = 31.25

Calculate the square root of the right side: 5.590169944

Break this problem into two subproblems by setting 
(x + -4.5) equal to 5.590169944 and -5.590169944.

Subproblem 1

x + -4.5 = 5.590169944 Simplifying x + -4.5 = 5.590169944 Reorder the terms: -4.5 + x = 5.590169944 Solving -4.5 + x = 5.590169944 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = 5.590169944 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = 5.590169944 + 4.5 x = 5.590169944 + 4.5 Combine like terms: 5.590169944 + 4.5 = 10.090169944 x = 10.090169944 Simplifying x = 10.090169944

Subproblem 2

x + -4.5 = -5.590169944 Simplifying x + -4.5 = -5.590169944 Reorder the terms: -4.5 + x = -5.590169944 Solving -4.5 + x = -5.590169944 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = -5.590169944 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = -5.590169944 + 4.5 x = -5.590169944 + 4.5 Combine like terms: -5.590169944 + 4.5 = -1.090169944 x = -1.090169944 Simplifying x = -1.090169944

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.090169944, -1.090169944}

See similar equations:

| 3/8=m/64 | | 5x+3ax+2ax= | | 205-4x=41x+15 | | 4x^2-68x+330=0 | | 5-2(y+3)=8 | | -5(7x-3)+2=-35x+17 | | 5+2x=-14 | | 6x+14/4=20 | | 18u^5-27u^4/3u^2 | | -1-8b=5-6b | | 4y-9y-3y= | | -5x-4=21 | | 2/3n=16 | | 78+87=12x | | 127-4x=41+22 | | 1+1=5x | | 36.9=3.7lb-14.9 | | 2/3+4 | | 5x*2y*4z= | | 5x*2y*47= | | 6-10=32-17x | | 10(x+0.1)=12 | | X^2-10x+4=o | | 125x-143x=144 | | 4x+4x^2+8=0 | | x^2+5x+6.25=4.25 | | 2x+35=9x-29 | | 5(x+12)=x | | 8x+95=2x+200 | | 2.1(y-14)=1.2(y-11) | | A=9/2(b+35) | | 143-2x=34x+15 |

Equations solver categories