Sagot :
a)3(x+4) b)(x-4)-(2+4x) c)4-(xpuissance2+5x-8) d)(x+2)(x+6)
a = 3x+12
b = x-4-2-4x = -3x -6
c= 4 -(x²+5x-8) = 4-x²-5x+8 = -x² -5x +12
d = x²+6x +2x +12 = x² + 8x +12
a = 3x+12
b = x-4-2-4x = -3x -6
c= 4 -(x²+5x-8) = 4-x²-5x+8 = -x² -5x +12
d = x²+6x +2x +12 = x² + 8x +12
a) = 3(x+4)
= 3*x + 3*4
=3x + 12
b) = (x-4)-(2+4x)
=x*2 + x*4x - 4*2 + 4*4x
= 2x +[tex] 4x^{2} [/tex] - 8 + 16x
= 18x + [tex] 4x^{2} [/tex] - 8
c) =4([tex] x^{2} [/tex]+5x - 8
=4 - [tex] x^{2} [/tex] + 5x - 8
=12 - [tex] x^{2} [/tex] + 5x
d) =(x+2)(x+6)
= x*x+x*6*2*x+2*6
=[tex] x^{2} [/tex] + 6x * 2x + 12
=[tex] x^{2} [/tex] + 12x + 12
= 3*x + 3*4
=3x + 12
b) = (x-4)-(2+4x)
=x*2 + x*4x - 4*2 + 4*4x
= 2x +[tex] 4x^{2} [/tex] - 8 + 16x
= 18x + [tex] 4x^{2} [/tex] - 8
c) =4([tex] x^{2} [/tex]+5x - 8
=4 - [tex] x^{2} [/tex] + 5x - 8
=12 - [tex] x^{2} [/tex] + 5x
d) =(x+2)(x+6)
= x*x+x*6*2*x+2*6
=[tex] x^{2} [/tex] + 6x * 2x + 12
=[tex] x^{2} [/tex] + 12x + 12