Question

Find the value of the expression:
a
p^2q^2+pq–q^3–p^3 for p=1 and q=−1

Answer 1

0

Explanation:

Put the numbers where the letters are and do the arithmetic.

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

= 1·1 -1 -(-1) -1

= 1 - 1 + 1 - 1 = 0

The value of the expression is 0.