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Polynomials

State whether...

Question

State whether True or False.
Multiply: $x + 4$ by $x - 5$ .
The answer is $x^{2} - x - 20$ .

A

True

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B

False

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Solution

The correct option is A True
$(x + 4) \times (x - 5)$
$= x (x - 5) + 4 (x - 5)$
$= x^{2} - 5 x + 4 x - 20$
$= x^{2} - x - 20$

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