x^2+8x-57=6

Simple and best practice solution for x^2+8x-57=6 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-57=6 equation:


Simplifying
x2 + 8x + -57 = 6

Reorder the terms:
-57 + 8x + x2 = 6

Solving
-57 + 8x + x2 = 6

Solving for variable 'x'.

Reorder the terms:
-57 + -6 + 8x + x2 = 6 + -6

Combine like terms: -57 + -6 = -63
-63 + 8x + x2 = 6 + -6

Combine like terms: 6 + -6 = 0
-63 + 8x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '63' to each side of the equation.
-63 + 8x + 63 + x2 = 0 + 63

Reorder the terms:
-63 + 63 + 8x + x2 = 0 + 63

Combine like terms: -63 + 63 = 0
0 + 8x + x2 = 0 + 63
8x + x2 = 0 + 63

Combine like terms: 0 + 63 = 63
8x + x2 = 63

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 = 63 + 16

Reorder the terms:
16 + 8x + x2 = 63 + 16

Combine like terms: 63 + 16 = 79
16 + 8x + x2 = 79

Factor a perfect square on the left side:
(x + 4)(x + 4) = 79

Calculate the square root of the right side: 8.888194417

Break this problem into two subproblems by setting 
(x + 4) equal to 8.888194417 and -8.888194417.

Subproblem 1

x + 4 = 8.888194417 Simplifying x + 4 = 8.888194417 Reorder the terms: 4 + x = 8.888194417 Solving 4 + x = 8.888194417 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 = 8.888194417 + -4 Combine like terms: 4 + -4 = 0 0 + x = 8.888194417 + -4 x = 8.888194417 + -4 Combine like terms: 8.888194417 + -4 = 4.888194417 x = 4.888194417 Simplifying x = 4.888194417

Subproblem 2

x + 4 = -8.888194417 Simplifying x + 4 = -8.888194417 Reorder the terms: 4 + x = -8.888194417 Solving 4 + x = -8.888194417 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 = -8.888194417 + -4 Combine like terms: 4 + -4 = 0 0 + x = -8.888194417 + -4 x = -8.888194417 + -4 Combine like terms: -8.888194417 + -4 = -12.888194417 x = -12.888194417 Simplifying x = -12.888194417

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.888194417, -12.888194417}

See similar equations:

| 8k-6=-(1-3k) | | 3(0.3)+(-1)(1-0.3)=x | | 6x-6=-5x+5 | | 3(0.3)+(-1)(1-0.3)= | | 100+20t+3t^2=0 | | 5x-10=6-x | | -3(1-3)+8(x-3)=6x+7-5x | | mx+bformx+5y=-5 | | -50+12=-38 | | 6(3x-6)=50 | | 8+2(-5+9n)=15+n | | 10p-2p-9=39 | | 4(2x-4)=9 | | 3(q)+(-1)(1-q)=(-4)q+2(1-q) | | x-21+x=47 | | P/5-4=6 | | -8w=2 | | 6x+10=6(x+3) | | 6x-12=20+4 | | 9(3y-6)-(8y+3)= | | y=-(4-x)(x+3) | | 6+4w=-2 | | x^2-2.1x+0.8=0 | | 22a-22=-4(1-4a) | | 8x-15+4=5x+6 | | X-5=0.4444X | | 17c/5 | | 3(4)-12-2=x | | 10-7x-11x+4= | | 2=9x+7 | | F(x)=6x^2-900 | | x+2sqrt(x+1)=7 |

Equations solver categories