3b^2-28=8b

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Solution for 3b^2-28=8b equation:


Simplifying
3b2 + -28 = 8b

Reorder the terms:
-28 + 3b2 = 8b

Solving
-28 + 3b2 = 8b

Solving for variable 'b'.

Reorder the terms:
-28 + -8b + 3b2 = 8b + -8b

Combine like terms: 8b + -8b = 0
-28 + -8b + 3b2 = 0

Factor a trinomial.
(-2 + -1b)(14 + -3b) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(14 + -3b)' equal to zero and attempt to solve: Simplifying 14 + -3b = 0 Solving 14 + -3b = 0 Move all terms containing b to the left, all other terms to the right. Add '-14' to each side of the equation. 14 + -14 + -3b = 0 + -14 Combine like terms: 14 + -14 = 0 0 + -3b = 0 + -14 -3b = 0 + -14 Combine like terms: 0 + -14 = -14 -3b = -14 Divide each side by '-3'. b = 4.666666667 Simplifying b = 4.666666667

Solution

b = {-2, 4.666666667}

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