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Manonoustric
@Manonoustric
May 2019
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Svp j'ai besoin d'aide, résoudre équation: (t+1)(-2t-3)=0; (x+5)*(x+5)+(x+5)(x-1)=0; (2x+3)*(2x+3)-4=0; (7t+11)*(7t+11)=36; x*x-2x+1=0. quand ya le signe * entre deux nombres c que l'ensemble de nombre est au carré. merci
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mohayati2006
Verified answer
(-2t-3)=0
-2t=3
t=-3/2
(x+5) (x+5)+(x+5)(x-1)=0
(x+5) (x+5+(x-1))=0
(x+5) (x+5+x-1)=0
(x+5) (2x+4)=0
donc
x+5=0 ou 2x+4=0
x=-5 ou x=-4/2
x=-5 ou x=-2
(2x+3)(2x+3)-4=0
(2x+3)²-2²=0
(2x+3-2)(2x+3+2)=0
(2x+1) (2x+5)=0
2x+1=0 ou 2x+5=0
donc
x=-1/2 ou x=-5/2
(7t+11) (7t+11)=36
(7t+11)²-6²=0
(7t+11-6) (7t+11+6)=0
(7t+5) (7t+17)=0
7t+5=0 ou 7t+17=0
donc
t=-5/7 ou t=-17/7
x²-2x+1=0
(x-1)²=0
x-1=0
x=1
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Verified answer
(-2t-3)=0-2t=3
t=-3/2
(x+5) (x+5)+(x+5)(x-1)=0
(x+5) (x+5+(x-1))=0
(x+5) (x+5+x-1)=0
(x+5) (2x+4)=0
donc
x+5=0 ou 2x+4=0
x=-5 ou x=-4/2
x=-5 ou x=-2
(2x+3)(2x+3)-4=0
(2x+3)²-2²=0
(2x+3-2)(2x+3+2)=0
(2x+1) (2x+5)=0
2x+1=0 ou 2x+5=0
donc
x=-1/2 ou x=-5/2
(7t+11) (7t+11)=36
(7t+11)²-6²=0
(7t+11-6) (7t+11+6)=0
(7t+5) (7t+17)=0
7t+5=0 ou 7t+17=0
donc
t=-5/7 ou t=-17/7
x²-2x+1=0
(x-1)²=0
x-1=0
x=1