1.

Find the product:5a(6a – 3b)

Answer»

5a(6a – 3b)

Let p, q and r be three monomials.

Then, by distributive law of multiplication over subtraction, we have:

P × (q – r) = (p × q) – (p × r)

Now,

= (5a × 6a) – (5a × 3b)

= (30a2 – 15ab) … [∵ am × an = am+n]



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