How do you FOIL #(√3 - √5) (√5 + √7)#?

Answer 1

Eva Adamson

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Answer 2

Abigail Allen

To FOIL the expression (√3 - √5)(√5 + √7), you multiply the First terms, Outer terms, Inner terms, and Last terms.

First: √3 * √5 = √15 Outer: √3 * √7 = √21 Inner: -√5 * √5 = -√25 Last: -√5 * √7 = -√35

Combine like terms: √15 + √21 - √25 - √35.

Finally, simplify the expression by recognizing that √25 = 5, so the answer is: √15 + √21 - 5 - √35.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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