Sagot :
1. E=(3x)²+2*3x*2+2²-5*3x+5*2-2x*3x+2x*2
E=9x²+12x+4-15x+10-6x²+4x
E=3x²+1x+14
2. E=(3x+2)[(5-2x)-(3x+2)]
E=(3x+2)(5-2x-3x-2)
E=(3x+2)(3-5x)
3. E=(3x+2)(3-5x)
E=(3*-2+2)(3-5*-2)
E=(-6+2)(3+10)
E=-4*13
E=-52
J'espère que cela t'aidera !
= (3x+2)²-(5-2x)(3x+2)
=(3x²+2*3x*2+2²)-(5-2x)(3x+2)
=(9x²+12x+4)-(5-2x)(3x+2)
=(9x²+12x+4)-(15x+10-6x²-4x)
=9x²+12x+4-15x-10+6x²+4x
=15x²+x-6
2/ (3x+2)[(5-2x)-(3x+2)]
(3x+2)[5-2x-3x-2]
(3x+2)(3-5x)
3/(3*(-2)+2)(3-5*(-2))
(-6+2)(3-(-10))
-4+13
9