ejercicios matemáticos

MULTIPLICACIÓN DE POLINOMIOS

1. 2 a . 7 a = (2.7) a = 14 a2
2. 15 ay . 2a = (15. 2) (a.a) .y = 30 a2y
3. 13 bxy . -2 bxy = (13.-2) (b.b) .(x.x) .(y.y) = -26 b2 x2 y2
4. -2 vc. -3vcx= (-3.-2) .(v.v) .(c.c). x= 6 v2 c2 x
5. (2x+1).(3x+2)= 2x.(3x+2)+1.(3x+2)= 6x2+4x+3x+2=6x2(+4x+3x)+2=6x2+7x+2
6. (x-1).(x+2)=x.(x+2)-1.(x+2)= x2+2x-x-2=+x2(+2x-x)-2=x2+x-2
7. (3x+3). ( x2+2x+1)= 3x.  (x2+2x+1)+3.( x2+2x+1)= (3x3+6x2+3x)+(3x2+6x+3) = 3x3+9x2+9x+3
8. 6x4-12x3+6x2+15x3-30x2+15x-18x2+36x-18=6x4-12x3+15x3+6x2-30x2-18x2+15x+36x-18=6x4+3x3-42x2+51x-18
9. $2x+3$ y $5x-\mathrm{2=3xy}$