Bonjour il faut que vous m’aid Pcq je n’arr Pas cette exercice svpppp : A=(x-5)(x+2)+(x-5)(x-7). B=x au carré -10x. C=x(x+2)+3x. D=x au carré - 5x. E=(x+2)(x+1)-2(x+1) . F=(x+3)(x-2)-(x-2)(2x+1)
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il s'agit de factoriser les expressions
A = (x - 5)(x+2) + (x - 5)(x-7) = (x - 5)(x+2 + x - 7) = (x - 5)(2 x - 5)
B = x² - 10 x = x(x - 10)
C = x(x+2)+ 3 x = x(x + 2 + 3) = x(x+5)
D = x² - 5 x = x(x - 5)
E = (x+2)(x+1)-2(x+1) = (x+1)(x+2 - 2) = x(x+1)
F = (x+3)(x-2)-(x-2)(2 x + 1) = (x-2)(x+3 - 2 x - 1) = (x-2)(2 - x)
Bonjour
Je suppose qu il faut que tu factorises
A=(x-5)(x+2)+(x-5)(x-7).
(X-5)(X+2+x-7)
(X-5)(2x-5)
B=x au carré -10x.
X(x-10)
C=x(x+2)+3x.
X(x+2+3)
X(x+5)
D=x au carré - 5x.
X(x-5)
E=(x+2)(x+1)-2(x+1) .
(X+1)(x+2-2)
X(x+1)
F=(x+3)(x-2)-(x-2)(2x+1)
(X-2)(x+3-2x-1)
(X-2)(-x+2)
-(x-2)(x-2)
-(x-2)^2