Question

Q14) Find the value of
x³ + y³ - 12xy + 64 when x+y = -4 or Evaluate (99)³
using suitable identity,​

Answer 1

Answer:

2.(100-1)^3=99^3

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

a=100,b=1

substituting

100^3-1^3-3*100*100*1+3*1*1*100

1000000-1-30000+300

1000300-30001

970299