2. Use the identity (x + a) (x+b)= x +(a + b) x + ab to find the following products. (1) (x + 3) (x + 7) (ii) (4x + 5) (4x + 1) (ii) (4x - 5) (4.x - 1) (iv) (4x + 5) (4.x - 1) (w) (2x + 5y) (2x + 3y) dim (vi) (2a +9) (2a + 5) (vii) (xyz - 4) (xyz - 2)
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