Math Problem Statement
PGS lingkaran dari persamaan x ^ 2 + y ^ 2 + 2x + 4y = 0 & tegak lurus dengan persamaan x + 2y - 2 = 0
Solution
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Math Problem Analysis
Mathematical Concepts
Geometry
Analytic Geometry
Circles
Tangents
Linear Equations
Formulas
Standard equation of a circle: (x - a)^2 + (y - b)^2 = r^2
Slope-intercept form: y = mx + c
Perpendicular lines: m1 * m2 = -1
Theorems
Perpendicularity condition for lines
Equation of a tangent to a circle
Suitable Grade Level
Grades 10-12
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