Question

If a+b=5 and ab=6 find a2+b2
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Answer 1

Answer:

13

Step-by-step explanation:

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

5^2 = a^2 + b^2 + 2*6

25 = a^2 + b^2 + 12

a^2 + b^2 = 25 - 12

a^2 + b^2 = 13

Answer 2

Answer:

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

=5^2-2(6)

=25-12

a^2+b^2=13