3x^2+5x+40=90

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Solution for 3x^2+5x+40=90 equation:


Simplifying
3x2 + 5x + 40 = 90

Reorder the terms:
40 + 5x + 3x2 = 90

Solving
40 + 5x + 3x2 = 90

Solving for variable 'x'.

Reorder the terms:
40 + -90 + 5x + 3x2 = 90 + -90

Combine like terms: 40 + -90 = -50
-50 + 5x + 3x2 = 90 + -90

Combine like terms: 90 + -90 = 0
-50 + 5x + 3x2 = 0

Factor a trinomial.
(-5 + -1x)(10 + -3x) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(10 + -3x)' equal to zero and attempt to solve: Simplifying 10 + -3x = 0 Solving 10 + -3x = 0 Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + -3x = 0 + -10 Combine like terms: 10 + -10 = 0 0 + -3x = 0 + -10 -3x = 0 + -10 Combine like terms: 0 + -10 = -10 -3x = -10 Divide each side by '-3'. x = 3.333333333 Simplifying x = 3.333333333

Solution

x = {-5, 3.333333333}

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