2x(4x-7)=15

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Solution for 2x(4x-7)=15 equation:


Simplifying
2x(4x + -7) = 15

Reorder the terms:
2x(-7 + 4x) = 15
(-7 * 2x + 4x * 2x) = 15
(-14x + 8x2) = 15

Solving
-14x + 8x2 = 15

Solving for variable 'x'.

Reorder the terms:
-15 + -14x + 8x2 = 15 + -15

Combine like terms: 15 + -15 = 0
-15 + -14x + 8x2 = 0

Factor a trinomial.
(-3 + -4x)(5 + -2x) = 0

Subproblem 1

Set the factor '(-3 + -4x)' equal to zero and attempt to solve: Simplifying -3 + -4x = 0 Solving -3 + -4x = 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 + -4x = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -4x = 0 + 3 -4x = 0 + 3 Combine like terms: 0 + 3 = 3 -4x = 3 Divide each side by '-4'. x = -0.75 Simplifying x = -0.75

Subproblem 2

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

Solution

x = {-0.75, 2.5}

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