126=-16x^2+90x

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Solution for 126=-16x^2+90x equation:


Simplifying
126 = -16x2 + 90x

Reorder the terms:
126 = 90x + -16x2

Solving
126 = 90x + -16x2

Solving for variable 'x'.

Reorder the terms:
126 + -90x + 16x2 = 90x + -90x + -16x2 + 16x2

Combine like terms: 90x + -90x = 0
126 + -90x + 16x2 = 0 + -16x2 + 16x2
126 + -90x + 16x2 = -16x2 + 16x2

Combine like terms: -16x2 + 16x2 = 0
126 + -90x + 16x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(63 + -45x + 8x2) = 0

Factor a trinomial.
2((21 + -8x)(3 + -1x)) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(21 + -8x)' equal to zero and attempt to solve: Simplifying 21 + -8x = 0 Solving 21 + -8x = 0 Move all terms containing x to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + -21 + -8x = 0 + -21 Combine like terms: 21 + -21 = 0 0 + -8x = 0 + -21 -8x = 0 + -21 Combine like terms: 0 + -21 = -21 -8x = -21 Divide each side by '-8'. x = 2.625 Simplifying x = 2.625

Subproblem 2

Set the factor '(3 + -1x)' equal to zero and attempt to solve: Simplifying 3 + -1x = 0 Solving 3 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1x = 0 + -3 -1x = 0 + -3 Combine like terms: 0 + -3 = -3 -1x = -3 Divide each side by '-1'. x = 3 Simplifying x = 3

Solution

x = {2.625, 3}

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