x(9+10x)=40

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Solution for x(9+10x)=40 equation:


Simplifying
x(9 + 10x) = 40
(9 * x + 10x * x) = 40
(9x + 10x2) = 40

Solving
9x + 10x2 = 40

Solving for variable 'x'.

Reorder the terms:
-40 + 9x + 10x2 = 40 + -40

Combine like terms: 40 + -40 = 0
-40 + 9x + 10x2 = 0

Factor a trinomial.
(-5 + -2x)(8 + -5x) = 0

Subproblem 1

Set the factor '(-5 + -2x)' equal to zero and attempt to solve: Simplifying -5 + -2x = 0 Solving -5 + -2x = 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 + -2x = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -2x = 0 + 5 -2x = 0 + 5 Combine like terms: 0 + 5 = 5 -2x = 5 Divide each side by '-2'. x = -2.5 Simplifying x = -2.5

Subproblem 2

Set the factor '(8 + -5x)' equal to zero and attempt to solve: Simplifying 8 + -5x = 0 Solving 8 + -5x = 0 Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -5x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -5x = 0 + -8 -5x = 0 + -8 Combine like terms: 0 + -8 = -8 -5x = -8 Divide each side by '-5'. x = 1.6 Simplifying x = 1.6

Solution

x = {-2.5, 1.6}

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