I’m not sure if this is right but im guessing c.
The answer is: " 9a² + 7a " .
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Note: (3a)² + 7a = (3a)*(3a) + 7a = 9a² + 7a .
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U need to simplify 5×5 to 25,move the negative to the left, then simplify the brackets
12(4j+3)
because both are divisible by 12
