1) a:1 b:2
2) a:2 b:there is no b
3)a:-1 b:-3
<span>no está en mi equipo lo siento</span>
Answer:
48
Step-by-step explanation:
The formula for finding the area of a rectangle is: l * w = a
So 12*4 = 48.
I don't understand what you mean by 'mentally' but anyways, here is how to solve it.
(z−12)(z+12)
=(z+−12)(z+12)
=(z)(z)+(z)(12)+(−12)(z)+(−12)(12)
=z^2+12z−12z−144
=z^2−144