4b^2+8b-165=0

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Solution for 4b^2+8b-165=0 equation:


Simplifying
4b2 + 8b + -165 = 0

Reorder the terms:
-165 + 8b + 4b2 = 0

Solving
-165 + 8b + 4b2 = 0

Solving for variable 'b'.

Factor a trinomial.
(-15 + -2b)(11 + -2b) = 0

Subproblem 1

Set the factor '(-15 + -2b)' equal to zero and attempt to solve: Simplifying -15 + -2b = 0 Solving -15 + -2b = 0 Move all terms containing b to the left, all other terms to the right. Add '15' to each side of the equation. -15 + 15 + -2b = 0 + 15 Combine like terms: -15 + 15 = 0 0 + -2b = 0 + 15 -2b = 0 + 15 Combine like terms: 0 + 15 = 15 -2b = 15 Divide each side by '-2'. b = -7.5 Simplifying b = -7.5

Subproblem 2

Set the factor '(11 + -2b)' equal to zero and attempt to solve: Simplifying 11 + -2b = 0 Solving 11 + -2b = 0 Move all terms containing b to the left, all other terms to the right. Add '-11' to each side of the equation. 11 + -11 + -2b = 0 + -11 Combine like terms: 11 + -11 = 0 0 + -2b = 0 + -11 -2b = 0 + -11 Combine like terms: 0 + -11 = -11 -2b = -11 Divide each side by '-2'. b = 5.5 Simplifying b = 5.5

Solution

b = {-7.5, 5.5}

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