Explain the identity to solve
$(x + a) (x + b) = x^{2} + (a + b) x + a b$

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Solution

We will use distributive property to solve this
$(x + a) (x + b) = x^{2} + (a + b) x + a b$

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Question 2(i)
Use the identity $(x + a) (x + b) = x^{2} + (a + b) x + a b$ to find the following products:
(x+3)(x+7)

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