solve for r.\n-8r(r + 9) = 0\nwrite your answers as integers or fractions.\nr = or r =

Explanation:

Step1: Apply zero - product property

If (ab = 0), then (a=0) or (b = 0). For (-8r(r + 9)=0), we have two cases: (-8r=0) or (r + 9=0).

Step2: Solve (-8r = 0)

Divide both sides by (-8): (r=\frac{0}{-8}=0).

Step3: Solve (r + 9=0)

Subtract (9) from both sides: (r=-9).

Answer:

(r = 0) or (r=-9)