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active| newest | oldestKitemanadvised you, this is your answer:-7(2

a^{2}-4)is

-14

a^{2}+28L

28-14

a^{2}L

associativity. Here's a hint: a × (b + c) = a×b + a×c.For this specific example,multiply each thing inside the brackets by each thing outside the brackets.Beware of your signs.