Question

expand the following using suitable identities( x-9 )(x-9)

Answer 1

Have a look.... hope it helps ya❤❤

Answer 2

Answer:

$x^2-18x+81$

Step-by-step explanation:

⇒$(x-9)(x-9)=(x-9)^2$

We can expand this using the identity $(a-b)^2=a^2-2ab+b^2$

So,

⇒$(x-9)^2=x^2-2(x)(9)+(9)^2$

⇒$x^2-18x+81$

Hope that helps!... :)