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2. Find the equations of circles passing through (1,-1), touching the lines 4x+3y + 5 =0a3x - 4y - 10 =0.

Answer»

4x + 3y +5=0; 3x-4y-10=0 3(4x+3y+5)= 12x+9y + 15=0, 4(3x-4y-10)=12x-16y-40=0/ 25y=55; y=55/25=11/5; 4x+3(11/5)+5=4x+33/5+5= 4x=-33/5-5=33-25/5=8/5; 4x=8/5; x=8×4/5=32/5



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