Question

$\frac{x^{2}-y^{2} }{x-y}$ якщо х=1.5 а y=0.5

Answer 1

$\displaystyle\bf\\\frac{x^{2} -y^{2} }{x-y} =\frac{(x-y)(x+y)}{x-y} =x+y\\\\\\x=1,5 \ \ \ , \ \ \ y=0,5\\\\\\x+y=1,5+0,5=2\\\\\\Otvet: \ 2$