Question

упростите выражение (1-2ab/(a^2+b^2))*(a^2+ b^2)

Answer 1

$frac{1-2ab}{a^{2}+b^{2}}*(a^{2}+b^{2})=1-2ab$

Answer 2

(1-2ab/(a^2+b^2))×(a^2+b^2)=1-2ab