Sagot :
Bonjour,
A=(4x-1)(6-3x)
=4x*6-4x*3x-1*6+1*3x
=24x-12x²-6+3x
A=-12x²+27x-6
B=(x-2)(x+7)+x²
=x*x+7*x-2*x-2*7+x²
=x²+7x-2x-14+x²
B=2x²+5x-14
C=2x²+(x-4)(3-x)
=2x²+x*3-x*x-4*3+4*x
=2x²+3x-x²-12+4x
C=x²+7x-12
D=x(x-1)-3(x+1)
=x*x-1*x-3*x-3*1
=x²-x-3x-3
D=x²-4x-3
Bonjour,
Développer et réduire :
A= (4x - 1)(6 - 3x)
A= 24x-6-12x²+3x
A= -12x²+27x-6
B= (x - 2)(x + 7) + x²
B= x²-2x+7x-14+x²
B= 2x²+5x-14
C= 2x² + (x - 4)(3 - x)
C= 2x²+3x-12-x²+4x
C= x²+7x-12
D= x(x - 1) - 3(x + 1)
D= x²-x-3x-3
D= x²-4x-3