$(x + a) (x + b)$ = $x^{2}$ + () $x$ + $a b$

a + b

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a b

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a - b

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Solution

The correct option is A $a + b$
We know that
$(x + a) (x + b)$ = $x^{2}$ + $a x + b x + a b$ .

If we simplify this then,
$(x + a) (x + b)$
= $x^{2}$ + $a x + b x + a b$
= $x^{2}$ + $(a + b) x$ + $a b$

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