Question

If (a+b) =12and ab= 14,then (a×a + b×b)

Answer 1

Answer:

a²+b² = (a+b)²- 2ab,

where (a+b) = 12 and ab = 14

then

⇒ a² + b² = 12² - 2×14

⇒ a² + b² = 144 - 28

⇒ a² + b² = 116