z^2-18z+81-25x^2
(z-9)^2 -(5x)^2
(z-9+5x)(z-9-5x)
is this factored completely?
where's the 18z? it's set up as multiplication.
isn't the (z-9)^2 for the 18?
not sure how to finish it then
z^2 – 18z – 37 = 0
To check if the given expression is factored completely, we can compare it to its factored form.
Given expression: z^2 - 18z + 81 - 25x^2
Factored form: (z - 9 + 5x)(z - 9 - 5x)
By comparing the given expression with the factored form, we can see that they are equal. So, yes, the given expression is factored completely.