Question

Упростите выражение
(х+2)^2-(х-3)(х+3)

Answer 1

( x + 2 )² - ( x - 3 )( x + 3 ) = x² + 4x + 4 - ( x² - 9 ) = x² + 4x + 4 - x² + 9 =
= 4x + 13 

Answer 2

(Х+2)^2-(х-3)(х+3)=х^2+4х+4-(х^2+3х-3х-9)=х^2+4х+4-х^2+9=4х+13