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Helen [10]
3 years ago
8

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

Mathematics
1 answer:
jeka57 [31]3 years ago
5 0
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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