Question

simplify using identities ​

Answer 1

Answer:

$(x - \frac{y}{10} )(x + \frac{y}{10} ) \\ = ({x})^{2} - { (\frac{y}{10} })^{2} \\ = {x}^{2} - { \frac{ {y}^{2} }{100}$

Answer 2

Answer:

$identity \: used = (a - b)(a + b) = {a}^{2} - {b}^{2}$