4a^2+7a-27=9

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Solution for 4a^2+7a-27=9 equation:


Simplifying
4a2 + 7a + -27 = 9

Reorder the terms:
-27 + 7a + 4a2 = 9

Solving
-27 + 7a + 4a2 = 9

Solving for variable 'a'.

Reorder the terms:
-27 + -9 + 7a + 4a2 = 9 + -9

Combine like terms: -27 + -9 = -36
-36 + 7a + 4a2 = 9 + -9

Combine like terms: 9 + -9 = 0
-36 + 7a + 4a2 = 0

Factor a trinomial.
(-4 + -1a)(9 + -4a) = 0

Subproblem 1

Set the factor '(-4 + -1a)' equal to zero and attempt to solve: Simplifying -4 + -1a = 0 Solving -4 + -1a = 0 Move all terms containing a to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + -1a = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -1a = 0 + 4 -1a = 0 + 4 Combine like terms: 0 + 4 = 4 -1a = 4 Divide each side by '-1'. a = -4 Simplifying a = -4

Subproblem 2

Set the factor '(9 + -4a)' equal to zero and attempt to solve: Simplifying 9 + -4a = 0 Solving 9 + -4a = 0 Move all terms containing a to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -4a = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -4a = 0 + -9 -4a = 0 + -9 Combine like terms: 0 + -9 = -9 -4a = -9 Divide each side by '-4'. a = 2.25 Simplifying a = 2.25

Solution

a = {-4, 2.25}

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