im doing basic concepts in algebra and i need to how to solve this pronlem
To do as Kiteman advised you, this is your answer: -7(2a2-4) is -14a2+28 L
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Its a style thing, but I don't like hanging minus signs, so I always write 28-14a2
I'd prefer that too, but I was doing a "literal" there. L
Orksecurity has it almost right. The =word you need to know is associativity. Here's a hint: a × (b + c) = a×b + a×c.
Thanks for the correction.
For this specific example, multiply each thing inside the brackets by each thing outside the brackets. Beware of your signs.
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.