Math Problem Statement
en adoptant la demarche pour resoudre une equation G=0 , resoudre les equations suivantes a) x² +4x -21 =0 b) x²+11x+30 =0
Solution
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Math Problem Analysis
Mathematical Concepts
Algebra
Quadratic Equations
Discriminant
Formulas
Quadratic equation: ax^2 + bx + c = 0
Discriminant: Δ = b^2 - 4ac
Quadratic formula: x_1 = (-b - √Δ) / 2a, x_2 = (-b + √Δ) / 2a
Theorems
Quadratic formula
Discriminant-based solution
Suitable Grade Level
Grades 8-10