document.write( "Question 1074391: Y=7x cuts the circle x^2+y^2=50 at A and B A in quadrant one . Find coordinates of A and B
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Algebra.Com's Answer #689048 by ikleyn(52914) $\"\"$ $\"About$

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document.write( "Substitute 7x instead of y into equation of the circle.\r\n" );
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document.write( "You will get \r\n" );
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document.write( "x^2 + 49x^2 = 50  --->  50x^2 = 50,  x = +/-1.\r\n" );
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document.write( "Thus the point A is (x,y) = (1,7) in quadrant I.\r\n" );
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document.write( "The other point is (x,y) = (-1,-7) in quadrant III.\r\n" );
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