Question

a+b =7 and ab = 12 , find a power 3 + b power 3
10 points​

Answer 1

Formula,

Formula,(a+b)

Formula,(a+b) 2

Formula,(a+b) 2 =a

Formula,(a+b) 2 =a 2

Formula,(a+b) 2 =a 2 +b

Formula,(a+b) 2 =a 2 +b 2

Formula,(a+b) 2 =a 2 +b 2 +2ab

Formula,(a+b) 2 =a 2 +b 2 +2ab7

Formula,(a+b) 2 =a 2 +b 2 +2ab7 2

Formula,(a+b) 2 =a 2 +b 2 +2ab7 2 =a

Formula,(a+b) 2 =a 2 +b 2 +2ab7 2 =a 2

Formula,(a+b) 2 =a 2 +b 2 +2ab7 2 =a 2 +b

Formula,(a+b) 2 =a 2 +b 2 +2ab7 2 =a 2 +b 2

Formula,(a+b) 2 =a 2 +b 2 +2ab7 2 =a 2 +b 2 +2(12)

Formula,(a+b) 2 =a 2 +b 2 +2ab7 2 =a 2 +b 2 +2(12)a

Formula,(a+b) 2 =a 2 +b 2 +2ab7 2 =a 2 +b 2 +2(12)a 2

Formula,(a+b) 2 =a 2 +b 2 +2ab7 2 =a 2 +b 2 +2(12)a 2 +b

Formula,(a+b) 2 =a 2 +b 2 +2ab7 2 =a 2 +b 2 +2(12)a 2 +b 2

Formula,(a+b) 2 =a 2 +b 2 +2ab7 2 =a 2 +b 2 +2(12)a 2 +b 2 =49−24=25

Answer 2

a+b)2=a2+b2+2ab

72=a2+b2+2(12)

a2+b2=49−24=25