4x^2-15=5x^2+16x

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Solution for 4x^2-15=5x^2+16x equation:


Simplifying
4x2 + -15 = 5x2 + 16x

Reorder the terms:
-15 + 4x2 = 5x2 + 16x

Reorder the terms:
-15 + 4x2 = 16x + 5x2

Solving
-15 + 4x2 = 16x + 5x2

Solving for variable 'x'.

Reorder the terms:
-15 + -16x + 4x2 + -5x2 = 16x + 5x2 + -16x + -5x2

Combine like terms: 4x2 + -5x2 = -1x2
-15 + -16x + -1x2 = 16x + 5x2 + -16x + -5x2

Reorder the terms:
-15 + -16x + -1x2 = 16x + -16x + 5x2 + -5x2

Combine like terms: 16x + -16x = 0
-15 + -16x + -1x2 = 0 + 5x2 + -5x2
-15 + -16x + -1x2 = 5x2 + -5x2

Combine like terms: 5x2 + -5x2 = 0
-15 + -16x + -1x2 = 0

Factor out the Greatest Common Factor (GCF), '-1'.
-1(15 + 16x + x2) = 0

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

Ignore the factor -1.

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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