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Efectuati:
a) 2x² + 5x² - 7x² + 6x²=
b) - 3a² +a² + (5a² - a²) + 6a²=
c) 12a³- 9a³+5a³+(16a³-14a³)=
d) (5x²-3x²+9x²)-(21x²-15x²)
Va rog ajutati-ma!


Răspuns :

A)7x^2-7x^2+6x^2=0+6x^2=6x^2 B)-2a^2+4a^2+6a^2=2a^2+6a^2=8a^2 C)3a^3+5a^3+2a^3=8a^3+2a^3=10a^3 D)(2x^2+9x^2)-(+6x^2)=11x^2-6x^2=5x^2