what is 3(3x-4)2-4
Multiplied out it's:
3(3x-4)2 - 4
= 3(3x-4)(3x-4) - 4
= 3(9x2-24x+16) - 4
= 27x2 - 72x + 48 - 4
= 27x2 - 72x + 44