-9b(7-5b)=

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Solution for -9b(7-5b)= equation: 


Simplifying
-9b(7 + -5b) = 0
(7 * -9b + -5b * -9b) = 0
(-63b + 45b2) = 0

Solving
-63b + 45b2 = 0

Solving for variable 'b'.

Factor out the Greatest Common Factor (GCF), '9b'.
9b(-7 + 5b) = 0

Ignore the factor 9.

Subproblem 1
Set the factor 'b' equal to zero and attempt to solve:

Simplifying
b = 0

Solving
b = 0

Move all terms containing b to the left, all other terms to the right.

Simplifying
b = 0

Subproblem 2
Set the factor '(-7 + 5b)' equal to zero and attempt to solve:

Simplifying
-7 + 5b = 0

Solving
-7 + 5b = 0

Move all terms containing b to the left, all other terms to the right.

Add '7' to each side of the equation.
-7 + 7 + 5b = 0 + 7

Combine like terms: -7 + 7 = 0
0 + 5b = 0 + 7
5b = 0 + 7

Combine like terms: 0 + 7 = 7
5b = 7

Divide each side by '5'.
b = 1.4

Simplifying
b = 1.4
Solution
b = {0, 1.4}

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