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JulienG
@JulienG
April 2019
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(7x+5)au carre +(-7x+5)(x-7) = 0
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(7x+5)²+(5-7x)(x-7)=0
49x²+70x+25-7x²-35+49x+5x=0
42x²+124x-10=0
21x²+62x-5=0
x=-31/21-√1066/21
ou
x=-31/21+√1066/21
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JuliEng
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49x²+70x+25-7x²-35+49x+5x=0
42x²+124x-10=0
21x²+62x-5=0
x=-31/21-√1066/21
ou x=-31/21+√1066/21