Bonsoir,
ex 3:
Factoriser:
A= (x+2)(2x+3-x-1) changement de signe
A= (x+2)(x+2)
A= (x+2)²
B= (2x+1)(1 -2+x) changement de signe
B= (2x+1)(x-1)
C= (x+3)(-x+1-x-3) changement de signe
C= (x+3)(-2x-2)
C= -2(x+3)(x+1) **(-2x-2)= -2(x+1)
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Bonsoir,
ex 3:
Factoriser:
A= (x+2)(2x+3-x-1) changement de signe
A= (x+2)(x+2)
A= (x+2)²
B= (2x+1)(1 -2+x) changement de signe
B= (2x+1)(x-1)
C= (x+3)(-x+1-x-3) changement de signe
C= (x+3)(-2x-2)
C= -2(x+3)(x+1) **(-2x-2)= -2(x+1)