X-ով հավասարումներ

  1. 3/x-2+7/x+2=10/x x≠2,-2,0

3(x+2)+7(x-3)/(x-2)(x+2) =10/x

3x+6+7x-14/x2-4=10/x

10x-8/x2-4=10/x

10x2-40=10x2-8x

-8x+40=0

8x=40

x=5

2) 7/x-3-10/x+1=15/x-1

7x+7-10x+30/(x-3)(x+1)=15/x-1

-3x+37/x2-2x-3=15/-x-1

(x-1)(-3x+37)=15(x2-2x-3)

18x2-70x-8=0

9x2-35x-4=0

D= 372

x1=35+37/18=4

x2=35-37/18=-1/9

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