Question

please help me with this might be easy for you please​

Answer 1

Hello,

here's an identity you will find useful here:

(a+b)(a-b) = a² - b²

so here, a=3 and b=x

So this will be 3² - x² = 9 - x²

Hope this helps :)

Answer 2

3(3-x)+x(3-x)

9-3x+3x-x^2

9-x^2

I hope it helped