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Roxxgeoo123
a fost răspuns

a) -(-x)+(-x)=
b) 1,7y+2,3y-5y=
c) √13x²+√3x²-5√3x²=
d) -3y+9y-4y+(-3+9-4)y-2y=
e) 15a-7-2a+9-13a =

Răspuns :

Serbanbianca63
a) -(x)+(-x)=-x-x= 2x, B) 1,7y+2,3y-5y=4y-5y=y,c) √13x*2+√3x*2-5√3x*2=13x+3x-15x=16x-15x=x, d) -3y+9y+(-3+8-4)y-2y=6y-4y+(-3+9-4) y-2y =2y+(-3+9-4)-y-2y=0+(-3+9-4)y=(6-4)y=2y, ed) 15a-7+9-13a=13a-7+9-13a=0-7+9=-7+9=2

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