8x^2-6x-28x+21=

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Solution for 8x^2-6x-28x+21= equation:


Simplifying
8x2 + -6x + -28x + 21 = 0

Reorder the terms:
21 + -6x + -28x + 8x2 = 0

Combine like terms: -6x + -28x = -34x
21 + -34x + 8x2 = 0

Solving
21 + -34x + 8x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(3 + -4x)(7 + -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 '(7 + -2x)' equal to zero and attempt to solve: Simplifying 7 + -2x = 0 Solving 7 + -2x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -2x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -2x = 0 + -7 -2x = 0 + -7 Combine like terms: 0 + -7 = -7 -2x = -7 Divide each side by '-2'. x = 3.5 Simplifying x = 3.5

Solution

x = {0.75, 3.5}

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