[tex]\bold{[ \ Answer \ ]}[/tex]
[tex]\boxed{\bold{9x^{2} \ - \ 6xy \ + y^{2} }}[/tex]
[tex]\bold{[ \ Explanation \ ]}[/tex]
- [tex]\bold{Find \ Expansion: \ (3x \ - \ y^{2} )}[/tex]
[tex]\bold{----------------------}[/tex]
- [tex]\bold{[Apply \ Perfect \ Square \ Formula\ (\left(a-b\right)^2=a^2-2ab+b^2)] \ a \ = \ 3x, \ b \ = \ y}[/tex]
[tex]\bold{\left(3x\right)^2-2\cdot \:3xy+y^2}[/tex]
- [tex]\bold{[Simplify \ \left(3x\right)^2-2\cdot \:3xy+y^2] \ 9x^2-6xy+y^2}[/tex]
= [tex]\bold{9x^2-6xy+y^2}[/tex]
[tex]\boxed{\bold{[] \ Eclipsed \ []}}[/tex]
