-x^2+8x=-35

Simple and best practice solution for -x^2+8x=-35 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^2+8x=-35 equation:


Simplifying
-1x2 + 8x = -35

Reorder the terms:
8x + -1x2 = -35

Solving
8x + -1x2 = -35

Solving for variable 'x'.

Reorder the terms:
35 + 8x + -1x2 = -35 + 35

Combine like terms: -35 + 35 = 0
35 + 8x + -1x2 = 0

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

Divide each side by '-1'.
-35 + -8x + x2 = 0

Move the constant term to the right:

Add '35' to each side of the equation.
-35 + -8x + 35 + x2 = 0 + 35

Reorder the terms:
-35 + 35 + -8x + x2 = 0 + 35

Combine like terms: -35 + 35 = 0
0 + -8x + x2 = 0 + 35
-8x + x2 = 0 + 35

Combine like terms: 0 + 35 = 35
-8x + x2 = 35

The x term is -8x.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8x + 16 + x2 = 35 + 16

Reorder the terms:
16 + -8x + x2 = 35 + 16

Combine like terms: 35 + 16 = 51
16 + -8x + x2 = 51

Factor a perfect square on the left side:
(x + -4)(x + -4) = 51

Calculate the square root of the right side: 7.141428429

Break this problem into two subproblems by setting 
(x + -4) equal to 7.141428429 and -7.141428429.

Subproblem 1

x + -4 = 7.141428429 Simplifying x + -4 = 7.141428429 Reorder the terms: -4 + x = 7.141428429 Solving -4 + x = 7.141428429 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 7.141428429 + 4 Combine like terms: -4 + 4 = 0 0 + x = 7.141428429 + 4 x = 7.141428429 + 4 Combine like terms: 7.141428429 + 4 = 11.141428429 x = 11.141428429 Simplifying x = 11.141428429

Subproblem 2

x + -4 = -7.141428429 Simplifying x + -4 = -7.141428429 Reorder the terms: -4 + x = -7.141428429 Solving -4 + x = -7.141428429 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -7.141428429 + 4 Combine like terms: -4 + 4 = 0 0 + x = -7.141428429 + 4 x = -7.141428429 + 4 Combine like terms: -7.141428429 + 4 = -3.141428429 x = -3.141428429 Simplifying x = -3.141428429

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.141428429, -3.141428429}

See similar equations:

| y=70+14(x) | | (y-5)-(y+6)=6y | | 3x^2+4x+8=0 | | 4.3x^2-12x=0 | | 4.3x^2-12=0 | | 4.3x^2-1=0 | | 10(x+5)=9(x-5)+x | | 2(p+4)-8=-2(p+9)-5 | | x^2+100=12 | | -5+2u=-17 | | 4z-15-z-3=z+4 | | 1+3a=10a^2 | | 5w^2=16w+16 | | 2z-9=15 | | 11.25X=781.25 | | -6(n+3)-4=-2(n-3)-4 | | 5(y+3)-8y=36 | | -4x+14=10 | | 8-7x=5-6x | | -4x+14=14 | | 3(3y-20)=21 | | 10x+5=3(3x+2) | | 5m+2m-8=4m-5 | | 3r^2+26r+48=0 | | 8x-3-2x=3x+21 | | 1-(3x+5)=1x-(2x+8) | | -4x-14=10 | | 3x-4x+6=-2x+7 | | 3x-4x+6=2x+7 | | 6w^3+5w^2-6w=0 | | 7x-6=2x+39 | | 5a^2=26+24 |

Equations solver categories