SOLUTION: Solve by factoring {{{15y^2+15-50y+20=0}}}

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Question 1129770: Solve by factoring
15y%5E2%2B15-50y%2B20=0
Answer by 4198181(13) About Me  (Show Source):
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15y%5E2-50y%2B35=0
5%283y%5E2-10y%2B7%29=0
Use the a c method
What 2 numbers have a sum of ac and add to equal b?
ac=21
b=-10
-7,-3
Then put the 2 numbers over c and simplify if possible.
-7%2F7, -3%2F7
-1, -3%2F7
Put it into the equation and remember to always bring the negative to the middle,
5[(1y-1) (3y-7)]=0
1y-1=0, y=1
3y-7=0, 3y=7, y=7%2F3
So the answer is
y=1 and y=7%2F3