Sagot :
C = 2x * 3x + 2x * 7 + 5 * 3x + 5 * 7
C = 6x² + 14x + 15x + 35
C = 6x² + 29x + 35
D = x * x + x * 5 + 1 * x + 1 * 5
D = x² + 5x + x + 5
D = x² + 6x + 5
E = 4x * 2x + 4x * 6 + 5 * 2x + 5 * 6
E = 8x² + 24x + 10x + 30
E = 8x² + 34x + 30
F = 2 * 5x + 2 * 4 + x * 5x + x * 4
F = 10x + 8 + 5x² + 4x
F = 5x² + 14x + 8
C = 6x² + 14x + 15x + 35
C = 6x² + 29x + 35
D = x * x + x * 5 + 1 * x + 1 * 5
D = x² + 5x + x + 5
D = x² + 6x + 5
E = 4x * 2x + 4x * 6 + 5 * 2x + 5 * 6
E = 8x² + 24x + 10x + 30
E = 8x² + 34x + 30
F = 2 * 5x + 2 * 4 + x * 5x + x * 4
F = 10x + 8 + 5x² + 4x
F = 5x² + 14x + 8
Bonsoir,
Développe puis réduis chaque expression.
C = (2x + 5)(3.x + 7)
C = 2x * 3x + 2x *7 + 5*3x + 5*7
C = 6x²+14x+15x+35
C = 6x²+29x+35
D = (x + 1)(x + 5)
D= x*x+1*x+x*5+1*5
D= x²+x+5x+5
D= x²+6x+5
E = (4x + 5)(2x + 6)
E= 4x*2x+5*2x+4x*6+5*6
E= 8x²+10x+24x+30
E= 8x²+34x+30
F = (2 + x)(5x + 4)
F= 2*5x+2*4+x*5x+x*4
F= 10x+8+5x²+4x
F= 5x²+14x+8