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26-05-2019
Mathematics

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Simplify and select the answer with the appropriate restrictions for the variable. Will give Brainliest answer.

Simplify and select the answer with the appropriate restrictions for the variable Will give Brainliest answer class=

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JuliaN165 JuliaN165

26-05-2019

Answer:

[(x + 3) (x + 7)] / (3x + 21)

= [(x + 3) (x + 7)] / [3 (x + 7)]

= (x + 3) / 3

The denominator can't be equal to 0 therefore:

3 (x + 7) ≠ 0 ⇔ x + 7 ≠ 0 ⇔ x ≠ -7

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