0=x^2+4x-320

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Solution for 0=x^2+4x-320 equation:


Simplifying
0 = x2 + 4x + -320

Reorder the terms:
0 = -320 + 4x + x2

Solving
0 = -320 + 4x + x2

Solving for variable 'x'.

Combine like terms: 0 + 320 = 320
320 + -4x + -1x2 = -320 + 4x + x2 + 320 + -4x + -1x2

Reorder the terms:
320 + -4x + -1x2 = -320 + 320 + 4x + -4x + x2 + -1x2

Combine like terms: -320 + 320 = 0
320 + -4x + -1x2 = 0 + 4x + -4x + x2 + -1x2
320 + -4x + -1x2 = 4x + -4x + x2 + -1x2

Combine like terms: 4x + -4x = 0
320 + -4x + -1x2 = 0 + x2 + -1x2
320 + -4x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
320 + -4x + -1x2 = 0

Factor a trinomial.
(16 + -1x)(20 + x) = 0

Subproblem 1

Set the factor '(16 + -1x)' equal to zero and attempt to solve: Simplifying 16 + -1x = 0 Solving 16 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-16' to each side of the equation. 16 + -16 + -1x = 0 + -16 Combine like terms: 16 + -16 = 0 0 + -1x = 0 + -16 -1x = 0 + -16 Combine like terms: 0 + -16 = -16 -1x = -16 Divide each side by '-1'. x = 16 Simplifying x = 16

Subproblem 2

Set the factor '(20 + x)' equal to zero and attempt to solve: Simplifying 20 + x = 0 Solving 20 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + x = 0 + -20 Combine like terms: 20 + -20 = 0 0 + x = 0 + -20 x = 0 + -20 Combine like terms: 0 + -20 = -20 x = -20 Simplifying x = -20

Solution

x = {16, -20}

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