Find the coordinates of the intersection points of the circle x ^ 2 + y ^ 2 – 10x – 6y +9 = 0. with abscissa axis
June 2, 2021 | education
| In order to find the coordinates of the points of intersection of the circle x ^ 2 + y ^ 2 – 10x – 6y + 9 = 0 with the abscissa axis, it is necessary to substitute the value y = 0 into the equation of the circle and solve the resulting equation of the relative variable x.
Substituting the value y = 0 into the equation, we get:
x ^ 2 + 0 ^ 2 – 10x – 6 * 0 + 9 = 0.
We solve the resulting equation:
x ^ 2 – 10x + 9 = 0;
x = 5 ± √ (25 – 9) = 5 ± √16 = 5 ± 4;
x1 = 5 – 4 = 1;
x = 5 + 4 = 9.
Consequently, this circle intersects the abscissa at points (1; 0) and (9; 0).
Answer: (1; 0) and (9; 0).
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