Question

Find the square. (7m - 3)^2

Answer 1

(7m - 3)(7m - 3) and distribute.
Or use the trinomial if you memorized it.

Answer 2

\(49m^2 -42m +9\)

Answer 3

never done this can you write it out to the answer

Answer 4

It is pointless copying down answers, you will never learn this way.

Answer 5

that's why i asked you to write it out? :)

Answer 6

You should memorise these 3 formulas:
\[(a+b)^2 = a^2 + 2ab + b^2\]
\[(a-b)^2 = a^2 - 2ab + b^2\]
\[(a+b)(a-b) = a^2 - b^2\]

Answer 7

Apply formula 2 to this question.
(7m - 3)^2
a = 7m
b = -3
Is the asnwer obvious?

Answer 8

Bd2zBone is right @WooTangClanANTFW

Answer 9

so if the question is (2n + 2)(2n - 2) for finding the product do i use the third formula?

Answer 10

Yes.

Answer 11

So 2n + 2 is 4n? right...

Answer 12

or 4n^2 i dont see where the power comes from

Answer 13

(2n + 2)(2n - 2)
a = 2n
b = 2

so what is a^2 and what is b^2?

Answer 14

? so its 2n^2? and 2^2?

Answer 15

\[(2n)^2 = 2^2n^2 = 4n^2\]
\[2^2 = 4\]
\[4n^2 - 4\]