2a^2+a-18a-9=0

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Solution for 2a^2+a-18a-9=0 equation:


Simplifying
2a2 + a + -18a + -9 = 0

Reorder the terms:
-9 + a + -18a + 2a2 = 0

Combine like terms: a + -18a = -17a
-9 + -17a + 2a2 = 0

Solving
-9 + -17a + 2a2 = 0

Solving for variable 'a'.

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

Subproblem 1

Set the factor '(-1 + -2a)' equal to zero and attempt to solve: Simplifying -1 + -2a = 0 Solving -1 + -2a = 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 + -2a = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -2a = 0 + 1 -2a = 0 + 1 Combine like terms: 0 + 1 = 1 -2a = 1 Divide each side by '-2'. a = -0.5 Simplifying a = -0.5

Subproblem 2

Set the factor '(9 + -1a)' equal to zero and attempt to solve: Simplifying 9 + -1a = 0 Solving 9 + -1a = 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 + -1a = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1a = 0 + -9 -1a = 0 + -9 Combine like terms: 0 + -9 = -9 -1a = -9 Divide each side by '-1'. a = 9 Simplifying a = 9

Solution

a = {-0.5, 9}

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