Question

factorise
give me answer fast​

Answer 1

Answer:

=> ( 15x² - 45 ) - ( x² - 3 ) .

=> 15x² - x² - 45 + 3 .

=> 14x² - 42 or 14x ( x - 3 ) .

Answer 2

Answer:

if bracket will open the signs will change if there is minus outside bracket

there is no difference between 1x²or x²

I take minus to minus 1 to get perfect identiy