Math Problem Statement
en augmentant de 7cm la longueur de chaque coté d'un carré , l'aire du nouveau carré augmente de 81cm² . quelle est l'aire du carré initial ? peux tu repondre a ce probleme en entier en detaillant tous les calculs
Solution
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Math Problem Analysis
Mathematical Concepts
Algebra
Quadratic Equations
Geometry of Squares
Formulas
Area of a square: A = x^2
Expanded form of binomials: (x + a)^2 = x^2 + 2ax + a^2
Solving linear equations: ax + b = c
Theorems
Algebraic expansion of binomials
Difference of areas
Suitable Grade Level
Grades 8-10
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