Question

if a+b=11 and ab=30 find the value of a^2+b^2
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Answer 1

Answer:

61

Step-by-step explanation:

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

(11)^2-2×30=a^2+b^2

a2^2+b^2=61

Answer 2

Step-by-step explanation:

A+B=11

therefore,

(a+b)^2=121

a2+b2+2ab=121

a2+b2+60=121

a2+b2=121-60

a2+b2=61