You can put this solution on YOUR website! (-2a+6b-c)(-3b+6c-6d)
You have to make the minus sign(-) positive(+) between 2 blocks while dealing with two separate blocks in brackets.You have to multiply the signs of the terms inside the second block with (-) so every single term's sign will change to opposite sign such
as (-)*(-) = (+) and (-)*(+) = (-) and (+)*(+) = (+)
Now the total expression looks like now:
Now you can remove brackets because you made the minus sign plus between blocks.
Sum them up;
(
