3x^4-12x^3=15x^2

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Solution for 3x^4-12x^3=15x^2 equation:


Simplifying
3x4 + -12x3 = 15x2

Reorder the terms:
-12x3 + 3x4 = 15x2

Solving
-12x3 + 3x4 = 15x2

Solving for variable 'x'.

Reorder the terms:
-15x2 + -12x3 + 3x4 = 15x2 + -15x2

Combine like terms: 15x2 + -15x2 = 0
-15x2 + -12x3 + 3x4 = 0

Factor out the Greatest Common Factor (GCF), '3x2'.
3x2(-5 + -4x + x2) = 0

Factor a trinomial.
3x2((-1 + -1x)(5 + -1x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor 'x2' equal to zero and attempt to solve: Simplifying x2 = 0 Solving x2 = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x2 = 0 Take the square root of each side: x = {0}

Subproblem 2

Set the factor '(-1 + -1x)' equal to zero and attempt to solve: Simplifying -1 + -1x = 0 Solving -1 + -1x = 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 + -1x = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -1x = 0 + 1 -1x = 0 + 1 Combine like terms: 0 + 1 = 1 -1x = 1 Divide each side by '-1'. x = -1 Simplifying x = -1

Subproblem 3

Set the factor '(5 + -1x)' equal to zero and attempt to solve: Simplifying 5 + -1x = 0 Solving 5 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -1x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1x = 0 + -5 -1x = 0 + -5 Combine like terms: 0 + -5 = -5 -1x = -5 Divide each side by '-1'. x = 5 Simplifying x = 5

Solution

x = {0, -1, 5}

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