Math Problem Statement
y=x^2+5x+9とy=7x+kが接する場合のkを求めよ
Solution
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Math Problem Analysis
Mathematical Concepts
Algebra
Quadratic Equations
Tangency Condition
Discriminant
Formulas
Quadratic equation: ax^2 + bx + c = 0
Discriminant: Δ = b^2 - 4ac
Theorems
Tangency condition for quadratic and linear equations
Discriminant must be 0 for tangency
Suitable Grade Level
Grades 9-11
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