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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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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

User Nitesh Jindal
by
4.8k points

1 Answer

4 votes
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
User Tomahim
by
4.6k points
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