Question

Factor the expression
y^2+18y+81

Answer 1

First think of "something" multiply "sonething" =81 and also adds up to 18

Answer 2

9x9=81 9+9=18

Answer 3

yes,so,
(y+9)(y+9)

Answer 4

Got it thanks

Answer 5

yw

Answer 6

since 81 = 9^2
and the middle term is 2(9)(y) = 18y
You can use the identity:
(a+b)^2 = a^2 + 2ab + b^2
where in this case, a =y , b=9