9a^2-18a-2=-7

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Solution for 9a^2-18a-2=-7 equation:


Simplifying
9a2 + -18a + -2 = -7

Reorder the terms:
-2 + -18a + 9a2 = -7

Solving
-2 + -18a + 9a2 = -7

Solving for variable 'a'.

Reorder the terms:
-2 + 7 + -18a + 9a2 = -7 + 7

Combine like terms: -2 + 7 = 5
5 + -18a + 9a2 = -7 + 7

Combine like terms: -7 + 7 = 0
5 + -18a + 9a2 = 0

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

Subproblem 1

Set the factor '(1 + -3a)' equal to zero and attempt to solve: Simplifying 1 + -3a = 0 Solving 1 + -3a = 0 Move all terms containing a to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -3a = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -3a = 0 + -1 -3a = 0 + -1 Combine like terms: 0 + -1 = -1 -3a = -1 Divide each side by '-3'. a = 0.3333333333 Simplifying a = 0.3333333333

Subproblem 2

Set the factor '(5 + -3a)' equal to zero and attempt to solve: Simplifying 5 + -3a = 0 Solving 5 + -3a = 0 Move all terms containing a to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -3a = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -3a = 0 + -5 -3a = 0 + -5 Combine like terms: 0 + -5 = -5 -3a = -5 Divide each side by '-3'. a = 1.666666667 Simplifying a = 1.666666667

Solution

a = {0.3333333333, 1.666666667}

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