Answer:
6.2 a QR
6.2 b 180
6.3 a By aas axiom
Expand (3x)^2
When you see ^2, it means that the term(s) inside the parenthesis should be copied once, and multiplied.
(3x)^2 = (3x)(3x)
(3x)(3x) is your expanded form
<em>~Rise Above the Ordinary</em>
(160+8)×4
is the answer