15x^2+25=40x

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Solution for 15x^2+25=40x equation:


Simplifying
15x2 + 25 = 40x

Reorder the terms:
25 + 15x2 = 40x

Solving
25 + 15x2 = 40x

Solving for variable 'x'.

Reorder the terms:
25 + -40x + 15x2 = 40x + -40x

Combine like terms: 40x + -40x = 0
25 + -40x + 15x2 = 0

Factor out the Greatest Common Factor (GCF), '5'.
5(5 + -8x + 3x2) = 0

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

Ignore the factor 5.

Subproblem 1

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 2

Set the factor '(5 + -3x)' equal to zero and attempt to solve: Simplifying 5 + -3x = 0 Solving 5 + -3x = 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 + -3x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -3x = 0 + -5 -3x = 0 + -5 Combine like terms: 0 + -5 = -5 -3x = -5 Divide each side by '-3'. x = 1.666666667 Simplifying x = 1.666666667

Solution

x = {1, 1.666666667}

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