Question

Evaluate p² – q² –pq where p= –3 and q= 6

Answer 1

Given that p = -3, q = 6

And we have to evaluate p² - q² - pq

We have to just substitute the value of p and q in the given expression

p² - q² - pq

= (-3)² - (6)² - (-3)(6)

= 9 - 36 + 18

= 27 - 36

= -9

Answer 2

p² - q² - pq

→ (-3)²- (6)² - [(-3)×(6)]

→ 9 - 36 - (-18)

→ 9 - 36 + 18

∴ -9