Question

if a+b=8 and a³+b³=152 , find a²+b²

Answer 1

Answer:

(a+b)²=a²+b²×2ab

(8)²=152×2ab

64=152×2ab

152-64=2ab

88=2ab is ur ans oky

i hope it helpful for u oky

Answer 2

Answer:

34

Step-by-step explanation:

a+b=8

a=8-b----------(1)

(8-b)^3+b^3=152

512-192b+24b^2-b^3+b^3=152

24b^2-192b+360=0

24(b^2-8b+15)=0

b^2-8b+15=0

a=5,b=3

a^2+b^2=25+9

=34