Question

1) (а - у)(a +y)(a² +y²);
3) (х – 6у³)² : (х + 6у³)²;
5) (25х²+y²)(5х +y)(5х - у); ​

Answer 1

2. $a ^{4} - y ^{4}$
3. $\frac{x ^{2} - 12xy ^{3} 36y ^{6} }{(x +6y ^{3})^{2} }$
4. $625 {x}^{4} - {y}^{4}$