Question

If a-b=7 and ab=9,then A2 + B2 =

Answer 1

Answer:

a^2+b^2= Root 86

Step-by-step explanation:

Answer 2

Answer:

(a-b)²=a²+b²-2ab

a²+b²=(a-b)²+2ab

=7²+2×9

=49+18

=67

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