Question

if a-b =7, ab =8,find a^2+b^2​

Answer 1

Answer:

65

Step-by-step explanation:

Given,

A-b=7 and ab=8.

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

(7)^2 =a^2 +b^2 - 2(8)

49=a^2 +b^2 - 16

Therefore,a^2 +b^2 =49+16=65

Hope this helps!!

Answer 2

Answer:

65

Step-by-step explanation:

we have,

a-b = 7 ....(1)

and ab = 8

squaring eq. 1

so, (a-b)² = 7²

a²+b²-2ab = 49

by putting the value of ab

a²+b²-2(8) = 49

a²+b² = 49+16

so, a²+b² = 65 ....ans.