exam Maths Puzzle Numerical Ability

What is the answer to this problem when you multiply
7w(2w - 3)(2w + 3) What is the process for solving this problem?

Thank you.

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exam Other Question

state the number to replace ? a + 3a= 1a = 3a = (1 + ?) a

Distributive property

Thank you If ABC
+ DEF
= GHI

and
ADG
+BEH
=CFI

What numbers do you plug into this equation to make it correct both ways. IT says there are two answers.