7a^2+5a-18=0

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Solution for 7a^2+5a-18=0 equation:


Simplifying
7a2 + 5a + -18 = 0

Reorder the terms:
-18 + 5a + 7a2 = 0

Solving
-18 + 5a + 7a2 = 0

Solving for variable 'a'.

Factor a trinomial.
(-2 + -1a)(9 + -7a) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(9 + -7a)' equal to zero and attempt to solve: Simplifying 9 + -7a = 0 Solving 9 + -7a = 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 + -7a = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -7a = 0 + -9 -7a = 0 + -9 Combine like terms: 0 + -9 = -9 -7a = -9 Divide each side by '-7'. a = 1.285714286 Simplifying a = 1.285714286

Solution

a = {-2, 1.285714286}

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