1.

,2Use the identity (x + a) (x + b) =x2 + (a + b) x + ab to find the following products.(iii)(v)(4x 5) (4x-1)(2x + 5y) (2x +3y)(i) (4x 5) (4x + 1)(iv) (4x + 5) (4x-1)(vi) (2a2 +9) (2a25)(vi) (xyz-4) (axyz- 2)

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