Question

if P is equal to minus 2 q is equal to -1 and R is equal to 3 find the value of 3 P is 2 to the power 2 and 5 equals to the power 2 and 2 pqr​

Answer 1

Given,

p = -2

q = -1

r = 3

So,

p^3 + q^3 + r^3 + 3pqr

= (-2)^3 + (-1)^3 + (3)^3 + 3 x -1 x -2 x 3

= -8 + (-1) + 27 + 9 x 2

= -8 - 1 + 27 + 18

= 27 + 18 - 8 - 1

= 45 - 9

= 36