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Basil91
@Basil91
April 2019
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Bonsoir ! Pouvez-vous m'aider à développer puis à réduire cette expression :
(2x(-3)+3)x(3x(-3)-5)
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nathalienouts
(2x(-3)+3)x(3x(-3)-5)
= (-6x+3)(-9x-5)
= 54x
²+30x-27x-15
= 54x²+3x-15
1 votes
Thanks 1
Basil91
Merci beaucoup Nathalie !
babysana23
(2x(-3)+3)x(3x(-3)-5)
=(-6x+3)(-9x-5)
=-6x*(-9x)-6x*(-5)+3*(-9x)3*(-5)
=54x²+30x-27x-15
=54x²+3x-15
voilà ;)
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Pouvez-vous m'aider ? Je ne comprends pas !A = 4 ? 3,5 ? 25 ? 3 B = 7,4 + 1,05 + 2,6 + 7,95A = (4 ? 25) ? (3,5 ? 3) B = (7,4 + 2,6) + (1,05 + 7,95)A = 100 ? 10,5 B = 10 + 9A = 1 050 B = 19
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Basil91
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= (-6x+3)(-9x-5)
= 54x²+30x-27x-15
= 54x²+3x-15
=(-6x+3)(-9x-5)
=-6x*(-9x)-6x*(-5)+3*(-9x)3*(-5)
=54x²+30x-27x-15
=54x²+3x-15
voilà ;)