Question

Упростите выражение $(-b+sqrt{x})(-b-sqrt{x})$

Answer 1

$(-b+sqrt{x})(-b-sqrt{x})=(-b)^2-(sqrt{x})^2=b^2-x$

Answer 2

$(-b+sqrt{x})(-b-sqrt{x})=(b-sqrt{x})(b+sqrt{x})=b^{2}-(sqrt{x})^{2}=b^{2}-x$