Question

Find the value of a³+b³, using apparopriate Identitywhen a+b=6, ab=7
(a) 45
(b) 90
(c) 91
(d) 98​

Answer 1

Answer:

(b) 90

step by step explaination:

63= (a+b)3 =a3 + 3a2b + 3ab2+b3 = (a3+b3) + 3ab(a+b)

so rearranging,

a3+b3 = 63−3 (7)(6)= 90

that's it!!!

please mark it as brainliest!!!