Odpowiedzi

2009-11-22T12:55:17+01:00
A. 2b-1c
b. 5x(2)+15x-5x(3)+4
c. $a- b+2 - 2a +b + 2b - 8a
d. 3 * 1/4 + 1/4 * 2 - 2 =
E. - 7a + 2b
f. 12 - -27
g.- xy + 2y - 4xy - 7x + 3


Te w nawiasie to potegi...
2009-11-22T13:17:46+01:00
1/2(4b-2c)=2b-1c
5x(x=3)-(5x2=4)=5*3-5*4dp kwadratu=15-80=-65
4a-b+2-2a+b+2b-8a=2b+2-6a
3(1/2)do kadratu+1/2*2-2=3*1/4+1-2=3/4+1-2=1 3/4-2=-1/4
-4a+2b-8-3a+8=-7a+2b
2(-3)do kwadratu-[3*(-3)]=18-(-9)=18+9=27
-xy+2x+4xy-7x+3=3xy-5x+3