Question

if (a - b) = 4, a2 + b2 = 40, then find as-b3​

Answer 1

Answer:

a^3-b^3=96

Step-by-step explanation:

(a-b)^2=a^2-2ab+b^2

4^2=40-2ab

8=40-2ab

-2ab=-32

ab=-32/-2

ab=16

a^3-b^3=(a-b)(a^2+b^2-ab)

            =4(40-16)

            =4x24

            =96