The length of perpendicular from a point 1 ‚ 2 to the straight line 3x+4y+4=0
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(1,2)=(x,y)
3x+4y+4=0
3×1+4×2+4=0
3+8+4=0
15=0
3x+4y+4=0
3×1+4×2+4=0
3+8+4=0
15=0
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