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When 9x2 - 100 is factored, it is equivalent to (3x - b)(3x + b). What is a value for b? (1) 50 (3) 3 (2) 10 (4) 100

When 9x2 - 100 is factored, it is equivalent to (3x - b)(3x + b). What is a value for b? (1) 50 (3) 3 (2) 10 (4) 100
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When 9x2 - 100 is factored, it is equivalent to (3x - b)(3x + b).

What is a value for b?
(1) 50 (3) 3
(2) 10 (4) 100

User Jayraynet
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1 Answer

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(9 x 2 = 18) (18-100=-82) So you have to be able to multiply 3x - b and 3x + b to get -82. I believe the answer is (2).10
User L Balsdon
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