Question

if a=-2,b=-3&c=5&then find the value of
(1)a cube + b cube + c cube - 3abc
(2)2a+5b-4c+a square + b square - c square​

Answer 1

Answer:

1) (-2) cube + (-3) cube + (5) cube-3×(-2) ×(-3) ×5

= (-8) +(-27) +125-90

= 0

2) 2×(-2) +5×(-3) -4×5+(-2) sqre+ (-3) Sare(5) sqre

= -4 -15-30+4+9-25

= -61

Answer 2

Step-by-step explanation:

1. (-2)^3+(-3)^3+(5)^3-3(-2*-2*5)

= -8-27+125-60

= -35+65

= 65-35

= 30

2. 2(-2)+5(-3)-4(5)+(-2)^2+(-3)^2-(5)^2

= -4 -15-20+4+9-25

= -39 -12

= -51 .