Advanced Math practice question

Answer: A. 0 and 7

A product is 0 when either factor is 0: x = 0 or x − 7 = 0.

Why the other answers are wrong

B. 7 only

x = 0 also makes the product 0.

C. 0 and −7

x = −7 gives (−7)(−14) = 98.

D. −7 only

Neither the sign nor the count is right.

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