Respuestas
Respuesta:
1= 13a-13b
2= 0
3= 25x-12y-10
4= -13m+7n-6
5= 2a
6= -1x-30z
7= 8a²-12ab-11
8= 21a-30b
9= 66a³b
10= -2a-14
11= -129m²+6mn+7m³
12= 14x⁴y-7x³y²+31-y³
Explicación paso a paso:
1: 7a-9b+6a-4b=
= (7a+6a) + (-9b-4b)
= 13a-13b
2: a+b-c-b-c+2c
= (a-a) + (b-b) + (-c-c+2c)
= 0
3: 5x-11y-9+20x-1-y=
= (5x+20x) + (-11y-y) + (-9-1)
= 25x-12y-10
4: -6m+8n+5-m-n-6m-11=
= (-6m-m-6m) + (8n-n) + (5-11)
= -13m+7n-6
5: -a+b+2b-2c+3a+2c-3b=
= (-a+3a) + (b+2b-3b) + (-2c+2c)
= 2a
6: -81x+19y-30z+6y+80x+x-25y=
= (-81x+80x+x) + (19y+6y-25y) + (-30z)
= -1x-30z
7: 15a²-6ab-8a²+20-5ab-31+a²-ab=
= (15a²-8a²+a²) + (-6ab-5ab-ab) + (20-31)
= 8a²-12ab-11
8: -3a+4b-6a+81b-114b+31a-a-b=
= (-3a-6a-a+31a) + (4b+81b-114b-b)
= 21a-30b
9: -71a³b-84a⁴b²+50a³b+84a⁴b²-45a³b+18a³b=
= (-71a³b+50a³b-45a³b+18a³b) + (-84a⁴b²+84a⁴b²)
= 66a³b
10: -a+b-c+8+2+2b-19-2c-3a-3-3b+3c=
= (-a+2a-3a) + (b+2b-3b) + (-c-2c+3c) + (8-19-3)
= -2a-14
11: m²+71mn-14m²-65mn+m³-m²-115m²+6m³=
= (m²-14m²-m²-115m²) + (71mn-65mn) + (m³+6m³
= -129m²+6mn+7m³
12: x⁴y-x³y²+x²y-8x⁴y-x²y-10+x³y²-7x³y²-9+21x⁴y-y³+50=
= (x⁴y-8x⁴y+21x⁴y) + (-x³y²+x³y²-7x³y²) + (x²y-x²y) + (-10-9+50) + (-y³)
= 14x⁴y-7x³y²+31-y³