Question

If a + b = 11 and a2 +b2 = 61 find a3 + b3
.

Answer 1

(a+b)^2= 121
a2+b2+2ab=121
61+2ab=121
ab=30

a3+b3=(a+b)3-3ab(a+b) =(11)^3-90×11=11(121-90)=11×31=341

mark as brainliest

Answer 2

here is ur answer my friend :)