Question

If a + b = 7, a3 + b3 = 133, find 2 (a2 + b2)

Answer 1

Step-by-step explanation:

Given :

a + b = 7

a³ + b³ = 133.

Find : 2(a² + b²)

Solution: let , us square both sides ;

(a+b)² = 7²

= (a+b)² = 49

=> (a² + b²) = 49.

Now, 2(a² + b² ) = 2×49=98 (ans)...

Hope ! it's helpful..

Answer 2

Answer:

y

Step-by-step explanation:

2(a²+b²)= 2 × 49=98 ans

hpe it helps