Question

4. (b-2) (6-5)
8. (m + 3) (m - 2)
12. (5 - xy) (3 + xy)​

Answer 1

Step-by-step explanation:

$1. \: \: \: \: \: (b - 2)(6 - 5) \\ =( b - 2)(1) \\ = b - 2 \times 1 \\ = (b - 2) \\ 2. \: \: \: \: (m + 3)(m - 2) \\ = m + 3 \times m - 2 \\ = ({m}^{2} - 1) \\ 3. \: \: \: \: (5 - xy)(3 + xy) \\ = 5 - xy \times 3 + xy \\ = (15 -x {}^{2} )$

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