A = (x+1)(8+2x)+(1+x)(-3+7x) A = (8x+2x²+8+2x)+(-3+7x-3x+21x²) A = (8x+2x+2x²+8)+(-3+4x+21x²) A = (10x+2x²+8)-3x+4x+21x² A = 10x+2x²+8-3x+4x+21x² A = 10x-3x+4x+2x²+21x²+8 A = 11x+23x²+8
Factoriser :
A = (x+1)(8+2x)+(1+x)(-3+7x) A = (x+1)(8+2x)+(x+1)(-3+7x) ___ ___
Alors :
A = (x+1)(8+2x-3+7x) A = (x+1)(8-3+2x+7x) A = (x+1)(5+9x)
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Bonjour :Développer et réduire :
A = (x+1)(8+2x)+(1+x)(-3+7x)
A = (8x+2x²+8+2x)+(-3+7x-3x+21x²)
A = (8x+2x+2x²+8)+(-3+4x+21x²)
A = (10x+2x²+8)-3x+4x+21x²
A = 10x+2x²+8-3x+4x+21x²
A = 10x-3x+4x+2x²+21x²+8
A = 11x+23x²+8
Factoriser :
A = (x+1)(8+2x)+(1+x)(-3+7x)
A = (x+1)(8+2x)+(x+1)(-3+7x)
___ ___
Alors :
A = (x+1)(8+2x-3+7x)
A = (x+1)(8-3+2x+7x)
A = (x+1)(5+9x)
J’espère t'avoir t'aider