Factories the following quadratic equations 10Y2 + 21Y-10

Answer 1

10y²+21y-10=0

10y²+25y-4y-10=0

(10y²+25)-(4y+10)=0

5y(2y+5)-2(2y+5)=0

(5y-2)(2y+5)=0

5y-2=0 or 2y+5=0

Y=2/5 or y=-5/2

Answer 2

typo?
(10y²+25)-(4y+10)=0
or
(10y²+25y)-(4y+10)=0

Answer 3

Thanks sir yes it was a typo