### Instruction: Factor $9y^2-30y+25$.### Response: So this is a quadratic equation.
Yes, and it's also a trinomial.
Right, and it can be factored like this: $(3y-5) (3y-5)$.
Let's verify the answer by multiplying the two factors together.
$(3y-5) (3y-5) = 9y^2-30y+25$.