Ryan Cox
11/12/2023 · Senior High School
Soit \( m \) et \( n \) deux réels tels que \( m=4-3 \sqrt{2} \) et \( n=2+\frac{3}{2} \sqrt{2} \). a) Montre que le réel \( m \) est négatif. b) Montre que \( \mathrm{m}^{2}=34-24 \sqrt{2} \). Calcule \( n^{2} \) forme \( a+b \sqrt{2} \) avec \( a \) et \( b \) deux entiers relatifs. d) Justitie que \( m^{2}+4 n^{2}=68 \).
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a) \( m \) est négatif car \( 4 - 3\sqrt{2} < 0 \).
b) \( m^{2} = 34 - 24\sqrt{2} \).
c) \( n^{2} \) sous la forme \( a + b\sqrt{2} \) avec \( a \) et \( b \) entiers relatifs.
d) \( m^{2} + 4n^{2} = 68 \).
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