Question

3) find each of the following products: a) 3xyz × 5x × 0 b) (−4a) × (7a) c) −2x ² × (7a ²x ⁷ ) × (6a ⁵x ⁵ ) d) (2.1a ²bc) × 4ab ²

Answer 1

Answer:

a. 0

b. -28a²

c. -84x¹⁴a⁷

d.8.4a³b³c

Step-by-step explanation:

a)3xyz×5x×0

• = 3xyz×0
• =0 (anything multiplied zero is always zero)

b)(-4a)×(7a)

• = -4a×7a (first multiply the coefficients)
• = -28× a×a
• = -28a²

c)(-2x²)×(7a²x⁷)×(6a⁵x⁵)

• = -84×x²×a²×x⁷×a⁵×x⁵(First multiply the coefficients)
• = -84×x²×x⁷×x⁵×a²×a⁵(a^n ×a^m= a^n+m)
• = -84x¹⁴a⁷

d)(2.1a²bc)×4ab²

• = 8.4×a²×b×b²×c
• = 8.4a³b³c