Question

if a+b =12 and a*b = 14 then a*a+b*b

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Answer 1

Answer:

12×12+12×12

288

is answer

Answer 2

Answer:

a + b = 12

squaring both side

(a+b)2 = (12)2

using identity

a2 + b2 + 2ab = 144

a2 + b2 + 2×14 = 144

a2 + b2 + 28 = 144

a2 + b2 = 144-28

a2 + b2 = 116

a*a+b*b=116