Expanding Binomials

Michigan State University - Diagnostic Exam

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1.18

Which of the following is equivalent to $2 (3x - 5)$

a) $9x2 + 25$ b) $9x2 - 25$ c) $9x2 - 30x + 25$

d) $2 6x + 25$ e) $2 6x - 30x + 25$

Solution:

$2 2 2 2 (3x-5) = (3x) - 2(3x)(5) + 5 = 9x - 30x + 25$

Diagnostic:

If you miss this question please review squaring a binomial.

See 1.8: Multiplying Binomials .

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July 15, 2008