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Florine17
@Florine17
April 2019
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Aider moi s'il vous plait :((
tester l'égalité (2x-1)(4-x)=-2x²+8x-3
pour x=1 puis pour x=-2
Merciiiiiiiiii, beaucoup a la personne qui pourra m'aider kiss tout le monde :D :*
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nonotata
Verified answer
(2x-1)(4-x)=-2x²+8x-3 pour x = 1
(2 -1)(4-1) = -2 (1)² +8 -3
1x3 = -2 +5
3 =3
(2x-1)(4-x)=-2x²+8x-3 pour x = 2
(4 -1)(4-2) = -2 (2)² + 8*2 - 3
3* 2 = - 8 + 16 - 3
6 = 16-11
6= 5
impossible
1 votes
Thanks 1
winner123
Bonjour
tester l'égalité (2x-1)(4-x)=-2x²+8x-3
pour x = 1
(2-1)(4-1)= ( -2 +8-3)
1 x 3 = 3
pour x=1 puis pour x=-2
(-4-1)(4+2) = -8 -16-3
-5 x 6 = -27
-30 ≠-27
1 votes
Thanks 1
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Verified answer
(2x-1)(4-x)=-2x²+8x-3 pour x = 1(2 -1)(4-1) = -2 (1)² +8 -3
1x3 = -2 +5
3 =3
(2x-1)(4-x)=-2x²+8x-3 pour x = 2
(4 -1)(4-2) = -2 (2)² + 8*2 - 3
3* 2 = - 8 + 16 - 3
6 = 16-11
6= 5
impossible
tester l'égalité (2x-1)(4-x)=-2x²+8x-3
pour x = 1
(2-1)(4-1)= ( -2 +8-3)
1 x 3 = 3
pour x=1 puis pour x=-2
(-4-1)(4+2) = -8 -16-3
-5 x 6 = -27
-30 ≠-27