Math, asked by ts04673, 6 hours ago

Using identities, show that (7xy + 9z) ^ 2 - (7xy - 9z) ^ 2 = 252xyz​

Answers

Answered by Itzintellectual
1

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:

Answered by vb253350
0

Answer:

2445+233y is the answer

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