Question

factorise with suitable identity y^2-y^2/9​

Answer 1

$\huge{\mathcal{\blue{\underline{Answer}}}}$

Using : (a+b)(a-b)=a^2-b^2

$= (y {}^{2} - \frac{y {}^{2} }{9} )$

$\huge{\mathcal{\blue{\underline{(y+y/3)(y-y/3)}}}}$