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.. $(x+a)(x+b)=x^2+(a+b) x+a b$,
We have $(x-3)(x+5)=x^2+(-3+5) x+(-3)(5)=x^2+2 x-15$

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