Question

Helpppp


Find the product mentally.

(z - 12)(z + 12)

z2 - 144
z2 - 24t - 144
z2 + 144

Answer 1

whenever both of the signs are opposite.

(z-12)(z+12)
FOIL
you don't need to do outer and inner because they cancel out. you get +12x and -12x and those cancel out. so all you need to do is multiply -12*12 and you'll get -144

so it would be

z^2-144

Answer 2

@dirtydan667

Answer 3

shoot i had it subtracting :{