15. Line 3x + 4y = 25 touches the c...
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15. Line 3x + 4y = 25 touches the circle x² + y = 25 at the point- (A) (4,3) (B) (3, 4) (C)(-3,-4) (D) None of these 16. The equations of the tangents drawn from the point (0.1) to the circle x + y - 2x + 4y = 0 are - |_nyt 2-2 = 0

JEE/Engineering Exams
Maths
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( 3 x+4 y=25 ) ( n=frac{25-49}{3} ) ( m^{2}+y^{2}=25 ) ( left(frac{25-4 y}{3}right)^{2}+y^{2}=25 ) ( frac{625+16 y^{2}-200 y}{9}+y^{2}=25 ) ( 625+16 y^{2}-200 y+9 y^{2}=225 ) ( 25 y^{2}-200 y+400=0 ) ( y^{2}-8 y+16=0 ) ( y^{2}-8 y-4 quad y=8 pm sqrt{6-4(1) / 6} ) ( y=frac{8}{2}=4 ) ( y=4 ) ( 3 x+4(4)=25 ) ( 4=3 ) ( (x, y)=(3, y) )
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