Using identities, show that (7xy + 9z) ^ 2 - (7xy - 9z) ^ 2 = 252xyz
Answers
Answer:
1. Find the product of the following pairs of monomials
(i) 4, 7p (ii) – 4p, 7p (iii) – 4p, 7pq (iv) 4p3, – 3p (v) 4p, 0
Sol. (i) 4 × 7p = (4 × 7) × p = 28p (ii) – 4p × 7p = (– 4 × 7) × (p × p) = 28 p1+1 = 28p2q (iii) –4p × 7pq = (–4 × 7) × (p × p × q) = – 28p1+1q = – 28p2q (iv) 4p3 × (–3p) = {4 × (–3)} × (p3 × p) = – 12 × p3+1 = –12p4 (v) 4p × 0 = (4 × 0) × (p) = 0 × p = 0.
Step-by-step explanation:
Answer:
2445+233y is the answer