243=(4b-9)*b

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Solution for 243=(4b-9)*b equation:


Simplifying
243 = (4b + -9) * b

Reorder the terms:
243 = (-9 + 4b) * b

Reorder the terms for easier multiplication:
243 = b(-9 + 4b)
243 = (-9 * b + 4b * b)
243 = (-9b + 4b2)

Solving
243 = -9b + 4b2

Solving for variable 'b'.

Reorder the terms:
243 + 9b + -4b2 = -9b + 9b + 4b2 + -4b2

Combine like terms: -9b + 9b = 0
243 + 9b + -4b2 = 0 + 4b2 + -4b2
243 + 9b + -4b2 = 4b2 + -4b2

Combine like terms: 4b2 + -4b2 = 0
243 + 9b + -4b2 = 0

Factor a trinomial.
(9 + -1b)(27 + 4b) = 0

Subproblem 1

Set the factor '(9 + -1b)' equal to zero and attempt to solve: Simplifying 9 + -1b = 0 Solving 9 + -1b = 0 Move all terms containing b to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -1b = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1b = 0 + -9 -1b = 0 + -9 Combine like terms: 0 + -9 = -9 -1b = -9 Divide each side by '-1'. b = 9 Simplifying b = 9

Subproblem 2

Set the factor '(27 + 4b)' equal to zero and attempt to solve: Simplifying 27 + 4b = 0 Solving 27 + 4b = 0 Move all terms containing b to the left, all other terms to the right. Add '-27' to each side of the equation. 27 + -27 + 4b = 0 + -27 Combine like terms: 27 + -27 = 0 0 + 4b = 0 + -27 4b = 0 + -27 Combine like terms: 0 + -27 = -27 4b = -27 Divide each side by '4'. b = -6.75 Simplifying b = -6.75

Solution

b = {9, -6.75}

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