0lemonie 8 years ago ReplyUpvoteTo do as Kiteman advised you, this is your answer: -7(2a^{2}-4) is -14a^{2}+28 L

0steveastrouklemonie Answer 8 years ago ReplyUpvoteIts a style thing, but I don't like hanging minus signs, so I always write 28-14a^{2}

0lemoniesteveastrouk Answer 8 years ago ReplyUpvoteI'd prefer that too, but I was doing a "literal" there. L

0kelseymh 8 years ago ReplyUpvoteOrksecurity has it almost right. The =word you need to know is associativity. Here's a hint: a × (b + c) = a×b + a×c.

0Kiteman 8 years ago ReplyUpvoteFor this specific example, multiply each thing inside the brackets by each thing outside the brackets. Beware of your signs.

0orksecurity 8 years ago ReplyUpvoteTransitivity and commutivity. Think about how you might do it if a was a specific number but you weren't allowed to subtract 4 before doing the multiplication.

## Discussions

8 years ago

To do as

Kitemanadvised you, this is your answer:-7(2

a^{2}-4)is

-14

a^{2}+28L

Answer 8 years ago

Its a style thing, but I don't like hanging minus signs, so I always write

28-14

a^{2}Answer 8 years ago

I'd prefer that too, but I was doing a "literal" there.

L

8 years ago

Orksecurity has it almost right. The =word you need to know is

associativity. Here's a hint: a × (b + c) = a×b + a×c.Answer 8 years ago

Thanks for the correction.

8 years ago

For this specific example,multiply each thing inside the brackets by each thing outside the brackets.Beware of your signs.

8 years ago

Transitivity and commutivity. Think about how you might do it if a was a specific number but you weren't allowed to subtract 4 before doing the multiplication.