Question

If a² + b² = 135and ab = 11then value of a³ + b³ is​

Answer 1

Answer:

solution

step 1 find the value of (a + b) by using the given data

(a + b)² = a² + b² + 2ab

= (135) + 2×11

=> 135 + 22

=> 157

=> a + b = √157

now a³ + b³ = (a + b)(a² + b² - ab)

=> (√157)(135 - 11)

=> 124(√157) Answer