X^2+10X-135=0

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Solution for X^2+10X-135=0 equation:


Simplifying
X2 + 10X + -135 = 0

Reorder the terms:
-135 + 10X + X2 = 0

Solving
-135 + 10X + X2 = 0

Solving for variable 'X'.

Begin completing the square.

Move the constant term to the right:

Add '135' to each side of the equation.
-135 + 10X + 135 + X2 = 0 + 135

Reorder the terms:
-135 + 135 + 10X + X2 = 0 + 135

Combine like terms: -135 + 135 = 0
0 + 10X + X2 = 0 + 135
10X + X2 = 0 + 135

Combine like terms: 0 + 135 = 135
10X + X2 = 135

The X term is 10X.  Take half its coefficient (5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
10X + 25 + X2 = 135 + 25

Reorder the terms:
25 + 10X + X2 = 135 + 25

Combine like terms: 135 + 25 = 160
25 + 10X + X2 = 160

Factor a perfect square on the left side:
(X + 5)(X + 5) = 160

Calculate the square root of the right side: 12.649110641

Break this problem into two subproblems by setting 
(X + 5) equal to 12.649110641 and -12.649110641.

Subproblem 1

X + 5 = 12.649110641 Simplifying X + 5 = 12.649110641 Reorder the terms: 5 + X = 12.649110641 Solving 5 + X = 12.649110641 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + X = 12.649110641 + -5 Combine like terms: 5 + -5 = 0 0 + X = 12.649110641 + -5 X = 12.649110641 + -5 Combine like terms: 12.649110641 + -5 = 7.649110641 X = 7.649110641 Simplifying X = 7.649110641

Subproblem 2

X + 5 = -12.649110641 Simplifying X + 5 = -12.649110641 Reorder the terms: 5 + X = -12.649110641 Solving 5 + X = -12.649110641 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + X = -12.649110641 + -5 Combine like terms: 5 + -5 = 0 0 + X = -12.649110641 + -5 X = -12.649110641 + -5 Combine like terms: -12.649110641 + -5 = -17.649110641 X = -17.649110641 Simplifying X = -17.649110641

Solution

The solution to the problem is based on the solutions from the subproblems. X = {7.649110641, -17.649110641}

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