Question

Ajutati-ma va roggggg din suflet!!!!11

Answer 1

( x + 2 )^2 = x^2 + 4x + 4 ;
( 2x - 1 )^2 = 4x^2 - 4x + 1 ;
( x + 2 )^2 + ( 2x - 1 )^2 = 5x^2 + 5 = 5( x^2 + 1 ) ;
( x - 3 )^2 = x^2 - 6x + 9 ;
( 3x + 1 )^2 = 9x^2 + 6x + 1 ;
( x - 3 )^2 + ( 3x + 1 )^2 = 10x^2 + 10 = 5( x^2 + 1 ) ;
Atunci 5( x^2 + 1 ) / 10( x^2 + 1 ) = 1 / 2 care e valaore constanta pt. orice x ∈ R ;