Question

Desfaceti parantezele si reduceti termenii asemenea: a) (x + y + z) - ( -x + y +z) + (- x - y + z) b) 2x - ( - 3x - 1 + 2x²) + 3x² + (- 2x + 1 - 3x²) c)-(x²-3x²-1)-6x-1-(3x²-1-3x²)

Answer 1

$a) (x + y + z) - ( -x + y +z) + (- x - y + z)$$=\ \textgreater \ x+y+z-(-x+y+z)-x-y+z=\ \textgreater \ z+x-y-z+z$$=\ \textgreater \ x-y+z$
$b) 2x - ( - 3x - 1 + 2 x^{2} ) + 3 x^{2} + (- 2x + 1 - 3 x^{2} )$$=\ \textgreater \ 2x-(-3x-1+2 x^{2} )+3 x^{2} -2x+1-3 x^{2} =\ \textgreater \ 3x+1-2 x^{2} +1$$=\ \textgreater \ 3x+2-2 x^{2}$
$c)-( x^{2} -3 x^{2} -1)-6x-1-(3 x^{2} -1-3 x^{2} )$$=\ \textgreater \ -(-2 x^{2} -1)-6x-1-(-1)=\ \textgreater \ -(-2 x^{2} -1)-6x-1+1$$=\ \textgreater \ 2 x^{2} +1-6x$
$Succes$