a girl is 6 years younger than her brother ,the prodict of their ages is 135.find their ages

6 answers

(b - 6) * b= 135
b^2 - 6 b - 135 = 0
(b-15)(b+9) = 0
brother is 15.
15 - 6 = 9
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A girl is 6 years younger than her brother. The product of their ages is 135. Find their ages.
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