Find the products using appropriate identities: (x - 3) (x + 5) - Vidyadip

Question

Find the products using appropriate identities: $(x - 3) (x + 5)$

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Answer

We know the Identity $i.e., (x + a) (x + b) = x^2 + (a + b)x + ab,$
We have $(x – 3) (x + 5) = x^2 + (–3 + 5)x + (–3)(5) = x^2 + 2x \ – 15$

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