solve for q. separate multiple answers with a comma. (q + 21)(q + 4)=0

Explanation:

Step1: Apply zero - product property

If (ab = 0), then (a=0) or (b = 0). So, (q + 21=0) or (q + 4=0).

Step2: Solve (q + 21=0)

Subtract 21 from both sides: (q=-21).

Step3: Solve (q + 4=0)

Subtract 4 from both sides: (q=-4).

Answer:

(-21,-4)