x*x+16x=-15

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Solution for x*x+16x=-15 equation:


Simplifying
x * x + 16x = -15

Multiply x * x
x2 + 16x = -15

Reorder the terms:
16x + x2 = -15

Solving
16x + x2 = -15

Solving for variable 'x'.

Reorder the terms:
15 + 16x + x2 = -15 + 15

Combine like terms: -15 + 15 = 0
15 + 16x + x2 = 0

Factor a trinomial.
(15 + x)(1 + x) = 0

Subproblem 1

Set the factor '(15 + x)' equal to zero and attempt to solve: Simplifying 15 + x = 0 Solving 15 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + x = 0 + -15 Combine like terms: 15 + -15 = 0 0 + x = 0 + -15 x = 0 + -15 Combine like terms: 0 + -15 = -15 x = -15 Simplifying x = -15

Subproblem 2

Set the factor '(1 + x)' equal to zero and attempt to solve: Simplifying 1 + x = 0 Solving 1 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + x = 0 + -1 x = 0 + -1 Combine like terms: 0 + -1 = -1 x = -1 Simplifying x = -1

Solution

x = {-15, -1}

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