Question

answer the question​

Answer 1

Answer:

y ^2 + 6y -216 =0

y^2 +18 y -12y -216 =0

y (y+ 18) -12 (y +18) = 0

(y-12) (y +18) = 0

y = 12 ,-18

Answer 2

y2+6y-216=0

By using splitting the middle term

y2+18y-12y-216=0

y(y+18)-12(y+18)=0

(y-12)(y+18)=0

y-12=0

y=12

y+18=0

y=-18