Solve the equation 9b2 + 30b + 25 = 0. A. b = –5⁄3 B. b = –3⁄5, b = 3⁄5 C. b = –5⁄3, b = 5⁄3 D. b = 5

Question

Solve the equation 9b2 + 30b + 25 = 0.

A. b = –5⁄3
B. b = –3⁄5, b = 3⁄5
C. b = –5⁄3, b = 5⁄3
D. b = 5⁄3

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Mia 2 weeks 2021-10-12T08:35:25+00:00 1 Answer 0

Answers ( )

    0
    2021-10-12T08:37:23+00:00

    Factor the equation into…
    (3b+5)(3b+5)=0
    Each factor 3b+5=0 so 3b=-5 so b=-5/3

    Check:
    9(-5/3)^2+30(-5/3)+25=
    9(25/9)-50+25=
    25-50+25=0
    It checks,

    So answer is A.-5/3

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