Answer: The equation is w*(w-3)= 180 & Alex is 15 years old
Explanation:
Alex= w years old
Claudia= (w-3) years old
a) Equation, w*(w-3)= 180
b) Now,
w*(w-3)= 180
⇒ w²-3w-180= 0
⇒ (w+12)*(w-15)= 0
⇒ w= 15
Alex is 15 years old
Claudia is (15-3) = 12 years old