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Simplifying
x(x + -2) + (2x + -15) = 0
Reorder the terms:
x(-2 + x) + (2x + -15) = 0
(-2 * x + x * x) + (2x + -15) = 0
(-2x + x2) + (2x + -15) = 0
Reorder the terms:
-2x + x2 + (-15 + 2x) = 0
Remove parenthesis around (-15 + 2x)
-2x + x2 + -15 + 2x = 0
Reorder the terms:
-15 + -2x + 2x + x2 = 0
Combine like terms: -2x + 2x = 0
-15 + 0 + x2 = 0
-15 + x2 = 0
Solving
-15 + x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '15' to each side of the equation.
-15 + 15 + x2 = 0 + 15
Combine like terms: -15 + 15 = 0
0 + x2 = 0 + 15
x2 = 0 + 15
Combine like terms: 0 + 15 = 15
x2 = 15
Simplifying
x2 = 15
Take the square root of each side:
x = {-3.872983346, 3.872983346}
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