10b^2-20b-73=7

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Solution for 10b^2-20b-73=7 equation:


Simplifying
10b2 + -20b + -73 = 7

Reorder the terms:
-73 + -20b + 10b2 = 7

Solving
-73 + -20b + 10b2 = 7

Solving for variable 'b'.

Reorder the terms:
-73 + -7 + -20b + 10b2 = 7 + -7

Combine like terms: -73 + -7 = -80
-80 + -20b + 10b2 = 7 + -7

Combine like terms: 7 + -7 = 0
-80 + -20b + 10b2 = 0

Factor out the Greatest Common Factor (GCF), '10'.
10(-8 + -2b + b2) = 0

Factor a trinomial.
10((-2 + -1b)(4 + -1b)) = 0

Ignore the factor 10.

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 '(4 + -1b)' equal to zero and attempt to solve: Simplifying 4 + -1b = 0 Solving 4 + -1b = 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 + -1b = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1b = 0 + -4 -1b = 0 + -4 Combine like terms: 0 + -4 = -4 -1b = -4 Divide each side by '-1'. b = 4 Simplifying b = 4

Solution

b = {-2, 4}

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