20b^2-9b=20

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Solution for 20b^2-9b=20 equation:


Simplifying
20b2 + -9b = 20

Reorder the terms:
-9b + 20b2 = 20

Solving
-9b + 20b2 = 20

Solving for variable 'b'.

Reorder the terms:
-20 + -9b + 20b2 = 20 + -20

Combine like terms: 20 + -20 = 0
-20 + -9b + 20b2 = 0

Factor a trinomial.
(-4 + -5b)(5 + -4b) = 0

Subproblem 1

Set the factor '(-4 + -5b)' equal to zero and attempt to solve: Simplifying -4 + -5b = 0 Solving -4 + -5b = 0 Move all terms containing b to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + -5b = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -5b = 0 + 4 -5b = 0 + 4 Combine like terms: 0 + 4 = 4 -5b = 4 Divide each side by '-5'. b = -0.8 Simplifying b = -0.8

Subproblem 2

Set the factor '(5 + -4b)' equal to zero and attempt to solve: Simplifying 5 + -4b = 0 Solving 5 + -4b = 0 Move all terms containing b to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -4b = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -4b = 0 + -5 -4b = 0 + -5 Combine like terms: 0 + -5 = -5 -4b = -5 Divide each side by '-4'. b = 1.25 Simplifying b = 1.25

Solution

b = {-0.8, 1.25}

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