Question 616288
Find all rational zeros:
y=2x^3+2x^2-50x-50
y=2x^2(x+1)-50(x+1)
(x+1)(2x^2-50)=0
x+1=0
x=-1
or
2x^2-50=0
x^2-25=0
x^2=25
x=±√25=±5
zeros: -5, -1, and 5