2 Answers

Nelek · Answer 1 · 2018-12-31T07:47:07+0000

you cannot take the square root of a negative number
so set each of those things equal to 0
actually it has to be greater than or equal to 0

5x≥0
x≥0

x+3≥0
x≥-3

so x≥0 is the range

A is the answer, because sqrt(0)=0

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