9x^2+4x=28

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Solution for 9x^2+4x=28 equation:


Simplifying
9x2 + 4x = 28

Reorder the terms:
4x + 9x2 = 28

Solving
4x + 9x2 = 28

Solving for variable 'x'.

Reorder the terms:
-28 + 4x + 9x2 = 28 + -28

Combine like terms: 28 + -28 = 0
-28 + 4x + 9x2 = 0

Factor a trinomial.
(-2 + -1x)(14 + -9x) = 0

Subproblem 1

Set the factor '(-2 + -1x)' equal to zero and attempt to solve: Simplifying -2 + -1x = 0 Solving -2 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -1x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -1x = 0 + 2 -1x = 0 + 2 Combine like terms: 0 + 2 = 2 -1x = 2 Divide each side by '-1'. x = -2 Simplifying x = -2

Subproblem 2

Set the factor '(14 + -9x)' equal to zero and attempt to solve: Simplifying 14 + -9x = 0 Solving 14 + -9x = 0 Move all terms containing x to the left, all other terms to the right. Add '-14' to each side of the equation. 14 + -14 + -9x = 0 + -14 Combine like terms: 14 + -14 = 0 0 + -9x = 0 + -14 -9x = 0 + -14 Combine like terms: 0 + -14 = -14 -9x = -14 Divide each side by '-9'. x = 1.555555556 Simplifying x = 1.555555556

Solution

x = {-2, 1.555555556}

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