Question

If p=4,q=(-2),r=3 , find the value of p2+q2+r2-pq-qr-pr

Answer 1

Answer:

31 is the answer

Step-by-step explanation:

p² + q² + r² - pq - qr - pr

put p = 4, q = -2 and r = 3

(4)² + (-2)² + (3)² - (4)(-2) - (-2)(3) - (4)(3)

16 + 4 + 9 - (-8) - (-6) - 12

16 + 4 + 9 + 8 + 6 - 12

= 31