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coffinetamaya
@coffinetamaya
June 2021
1
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voilà j'ai un devoir maison pour jeudi pouvez vous m'aider?
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dolili971
X²=y²+10²
x²=(30-y)²+2²
x
²=
y
²+100
x
²=900-60y+y
²+4
par substitution
y
²+100
=900-60y+y
²+4
100=904-60y
60y=804
y=804/60
y=13.4
la distance est 13.4 cm
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coffinetamaya
merci beaucoup
dolili971
De rien
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Lista de comentários
x²=(30-y)²+2²
x²=y²+100
x²=900-60y+y²+4
par substitution
y²+100=900-60y+y²+4
100=904-60y
60y=804
y=804/60
y=13.4
la distance est 13.4 cm