Ответ:1).-1/10 2).-2/13 3).24/7 4).-39
Объяснение:
1).x(x+6)/2-x(x+14)/3-x^2+1/6=0 |*6
3x(x+6) -2x(x+14)-(x^2+1)=0
3x^2+18x-2x^2-28x-x^2-1=0
-10x-1=0
-10x=1
x=1/10
2).y(2y-1)/12-y^2+1/6=y |*12
y(2y-1)-2(y^2+1)=y
2y^2-y-2y^2-2=12y
-y-2=12y
-13y=2
y=-2/13
3).6+7y^2/3+ y(5-8y)/4=y(y+2)/3 |*12
4(6+7y^2)+3y(5-8y)=4y(y+2)
24+28y^y+15y-24y^2=4y^2+8y
28y^2+15y-24y^2-4y^2-8y=-24
7y=-24
y=-24/7
4).2m^2+1/4+3=m/6-m(1-2m)/4 |*12
3(2m^2+1)+36=2m-3m+6m^2
6m^2-6m^2+m=-39
m=-39
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
Ответ:1).-1/10 2).-2/13 3).24/7 4).-39
Объяснение:
1).x(x+6)/2-x(x+14)/3-x^2+1/6=0 |*6
3x(x+6) -2x(x+14)-(x^2+1)=0
3x^2+18x-2x^2-28x-x^2-1=0
-10x-1=0
-10x=1
x=1/10
2).y(2y-1)/12-y^2+1/6=y |*12
y(2y-1)-2(y^2+1)=y
2y^2-y-2y^2-2=12y
-y-2=12y
-13y=2
y=-2/13
3).6+7y^2/3+ y(5-8y)/4=y(y+2)/3 |*12
4(6+7y^2)+3y(5-8y)=4y(y+2)
24+28y^y+15y-24y^2=4y^2+8y
28y^2+15y-24y^2-4y^2-8y=-24
7y=-24
y=-24/7
4).2m^2+1/4+3=m/6-m(1-2m)/4 |*12
3(2m^2+1)+36=2m-3m+6m^2
6m^2-6m^2+m=-39
m=-39