3. Multiply
(i) a2 - 2ab by 4
(ii) 2b +5c by bc
(iv) 2ab-3a2-5b + 2 by 3a²b
(iii) 2 xy +3yz - zx by -5xyz
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Answer:
(i)4(a2-2ab)
= 8a-8ab
(ii)bc(2b+5c)
=2b²c+5bc²
(iii)-5xyz (2xy+3yz-zx)
= -10x²y²z-15xy²z²+5x²yz²
(iv)3a²b(2ab-3a2-5b)
= 6a³b²-18a³b-15a²b²
Step-by-step explanation:
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