Question

factorise y square + Y + 72​

Answer 1

Answer:

y=-9,8

Step-by-step explanation:

y^2+y+72=0

y^2+(9-8)y+72=0

y^2+9y-8y+72=0

y(y+9)-8(y+9)=0

(y+9)(y-8)=0

y+9=0. , y-8=0

y=-9. , y=8