alright samething but need help simplifyin the expression(the other 2 is 4 squared) 2x2+4x2-(x-3)-3x

Answer 1

I assume you mean
3x² + 4x² - (x-3) - 3x
= 6x² - x + 3 - 3x
= 6x² - 4x + 3

Answer 2

obviously that first term should have been

2x²