4x^2=31x+45

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Solution for 4x^2=31x+45 equation:


Simplifying
4x2 = 31x + 45

Reorder the terms:
4x2 = 45 + 31x

Solving
4x2 = 45 + 31x

Solving for variable 'x'.

Reorder the terms:
-45 + -31x + 4x2 = 45 + 31x + -45 + -31x

Reorder the terms:
-45 + -31x + 4x2 = 45 + -45 + 31x + -31x

Combine like terms: 45 + -45 = 0
-45 + -31x + 4x2 = 0 + 31x + -31x
-45 + -31x + 4x2 = 31x + -31x

Combine like terms: 31x + -31x = 0
-45 + -31x + 4x2 = 0

Factor a trinomial.
(-5 + -4x)(9 + -1x) = 0

Subproblem 1

Set the factor '(-5 + -4x)' equal to zero and attempt to solve: Simplifying -5 + -4x = 0 Solving -5 + -4x = 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 + -4x = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -4x = 0 + 5 -4x = 0 + 5 Combine like terms: 0 + 5 = 5 -4x = 5 Divide each side by '-4'. x = -1.25 Simplifying x = -1.25

Subproblem 2

Set the factor '(9 + -1x)' equal to zero and attempt to solve: Simplifying 9 + -1x = 0 Solving 9 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -1x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1x = 0 + -9 -1x = 0 + -9 Combine like terms: 0 + -9 = -9 -1x = -9 Divide each side by '-1'. x = 9 Simplifying x = 9

Solution

x = {-1.25, 9}

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