Question

If (a-b) = 7 and ab = 9, then a^2 + b^2

Answer 1

Answer:

Step-by-step explanation:

Hlo

a-b=7

ab=9

(a-b)^2=a^2+b^2 -2ab

(7)^2=a^2+b^2-2(9)

49=a^2+b^2-18

67=a^2+b^2

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