Question

Factorise the following expressions

        (i) 7x – 42

        (ii) 6p – 12q

        (iii) 7a2 + 14a

        (iv) –16z + 20z3

        (v) 20l2m + 30alm

        (vi) 5x2y – 15xy2

        (vii) 10a2 – 15b2 + 20c2

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Answer 1

Explanation:

1.7(x-6)

2.6(p-2q)

3.7a(a+2)

4.-4z(4-5z2)

6.5xy(x-3y)

Answer 2

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