(a-b) =7 and ab =9 then (a^2+b^2)
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Answer:
a²+b²=67
Step-by-step explanation:
a-b=7
ab=9
from expression (a-b)²=a²+b²-2ab, we get
a²+b²=(a-b)²+2ab
= 7²+2×9
=49+18 = 67.
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