Question

Efectuati prin reducerea termenilor asemenea

3a +b+(-a-b)
a+(2a+1) +(-a-1)
2x*2+(x*2-y)+(-3x*2+y)

Answer 1

3a + b + (-a - b) = 3a + b - a - b = 3a - a + b - b = 2a + 0 = 2a
a + (2a + 1) + (-a - 1) = a + 2a + 1 - a - 1 = a + 2a - a + 1 - 1 = 3a - a + 0 = 2a
2x · 2 + (x · 2 - y) + (-3x · 2 + y) = 4x + 2x - y + (-6x + y) = 6x - y - 6x + y = 6x - 6x +
+ y - y = 0 + 0 = 0.