Question

find the value of x cube + y cube + 50 x 5 - 125 if x + y = 5

Answer 1

Hey Mate
Answer to your question is as follow :



$=( { x}^{3} + {y}^{3}) +( 50 \times 5 )- 125 \\ =( x + y) \times (x + y) \times (x + y) + 250 - 125 \\ = 5 \times 5 \times 5 + 125 \\ = 125 + 125 = 150$