Find the product of the following pairs of monomials.(i) 3 × 5x(ii) �

1.	Find the product of the following pairs of monomials.(i) 3 × 5x(ii) – 5p, – 2q(iii) 7l2, – 3n2(iv) 6m, 3n(v) – 5x2, – 2x
Answer» (i) 3 × 5x = 3 × 5 × x = 15x (ii) – 5p,- 2q = (- 5) × p × (- 2) × q = (- 5) × (- 2) × p × q = 10pq (iii) 7l², – 3n² = 7 × l² × (- 3) × n² = 7 × (- 3) × l² × n² = – 21l²n² (iv) 6m, 3n = 6 × m × 3 × n = 6 × 3 × m × n = 18 mn (v) – 5x², – 2x = (- 5) × x² × (- 2) × x = (- 5) × (- 2) × x² × x = 10x³

Find the product of the following pairs of monomials.(i) 3 × 5x(ii) – 5p, – 2q(iii) 7l2, – 3n2(iv) 6m, 3n(v) – 5x2, – 2x

Answer»

(i) 3 × 5x

= 3 × 5 × x

= 15x

(ii) – 5p,- 2q

= (- 5) × p × (- 2) × q

= (- 5) × (- 2) × p × q

= 10pq

(iii) 7l², – 3n²

= 7 × l² × (- 3) × n²

= 7 × (- 3) × l² × n²

= – 21l²n²

(iv) 6m, 3n

= 6 × m × 3 × n

= 6 × 3 × m × n

= 18 mn

(v) – 5x², – 2x

= (- 5) × x² × (- 2) × x

= (- 5) × (- 2) × x² × x

= 10x³