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Calculati : a) (3x+10y) - (5x+4y) - (7x-2y) b) (4a²-5ab) - (ab+3b²) -(a²-b²)

Răspuns :

a. 3x+10y-5x-4y-7x+2y = -9x+8y
b. 4a²-5ab-ab-3b²-a²+b² = 3a²-6ab-2b²
a) 3x + 10y - 5x - 4y - 7x + 2y = -9x + 8y b) 4a^2 - 5ab - ab - 3b^2 - a^2 + b^2 = 3a^2 - 2b^2 -6ab