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reduceti termeni asemenea a: 4x-3x+5x ; b: 7xla adoua -3x la adoua +3xla adoua ; c: 2ab -5 ab ; d: 9xla adoua -11x la adoua -9x la adoua :::: gata care stie e foarte tare ai dau coroana

Răspuns :

a) 4x-3x+5x=6x
b) (7x)^2-(3x)^2+(3x)^2= (7x)^2
c) 2ab-5ab=-3ab
d) (9x)^2-(11x)^2-(9x)^2= -(11x)^2