Bonsoir j'aurai besoin de votre aide svp merci de m'aider ...
A=3x+6+(x+2)(x-8)
1.Factoriser 3x+6.
b)en déduire une factorisation deA
2. Factoriser:
a) B=x au carré- 4+(x-1)(x+2)
b) C = x au carré + 4x+(x+1)(x+4)
A=3x+6+(x+2)(x-8)
1.Factoriser 3x+6.
b)en déduire une factorisation deA
2. Factoriser:
a) B=x au carré- 4+(x-1)(x+2)
b) C = x au carré + 4x+(x+1)(x+4)
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Verified answer
1) 3 x+6 = 3(x+2)A=(x+2) (3 +x-8)=(x+2)(x-5)
B=x²-4+(x-1)(x+2)=(x+2)(2x-3)
C=x² +4x+(x+1)(x+4)=(x+4)(2x+1)
Verified answer
Bonjour,A = 3x + 6 + (x + 2)(x - 8)
1) factoriser 3 x + 6 :
3x + 6 = 3 * x + 3 * 2
3x + 6 = 3(x + 2)
b) déduire une factorisation :
A = 3(x + 2) + (x + 2)(x - 8)
A = (x + 2)(3 + x - 8)
A = (x + 2)(x - 5)
2) factoriser :
a) B = x^2 - 4 + (x - 1)(x + 2)
x^2 - 4 = a^2 - b^2 = (a - b)(a + b)
x^2 - (2)^2 = (x - 2)(x + 2)
B = (x - 2)(x + 2) + (x - 1)(x + 2)
B = (x + 2)(x - 2 + x - 1)
B = (x + 2)(2x - 3)
b) C = x^2 + 4x + (x + 1)(x + 4)
x^2 + 4x = x(x + 4)
C = x(x + 4) + (x + 1)(x + 4)
C = (x + 4)(x + x + 1)
C = (x + 4)(2x + 1)