A+b=6 ,ab=3 then find a2+ b2

1.	A+b=6 ,ab=3 then find a2+ b2
Answer» Sorry 30 39 a + b = 6 -------( 1 )ab = 3 ----------( 2 )Square the equation ( 1 ),( a + b )2 = (36 ) 2a2 + b2 + 2ab = 36a2 + b2 + 2 × 3 = 36 [ from ( 2 ) ]a2 + b2 + 6 = 36a2 + b2 = 36 - 6a2 + b2 = 30

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