Rozwiaz rownanie:
a) (x-1)(x+2)=(x+3)(x+4)
b) 6x(3-2x) = 5+4x(7-3x)
c) 5[2-6(x-1)] = 10
d) 1-[5(x+2)- 7] = 6(-x-3)
e) 4-4-[4-(4-x)] = 4
f) -x(4+x) +3 = x(7-x) + 5 (x - 9)
Doprowadz do najprostszej postaci:
a) 3x (x+1) + 7x(do kwadratu) - 3x
b) 3(-x+7a) + 21a + 3a
Dzieki.. daje naj.. :D
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A. nie wiem :(
B.6x(3-2x) = 5+4x(7-3x)
18x-12x2=5+28x-12x2
skracamy 12x2 i zostaje
18x=5+28x
18x-28x=5
(-10)x=5
x=5:(-10)
x=(-5/10)
C.5[2-6(x-1)] = 10
5[2-6x+6]=10
10-30x+30=10
-30x=10-10-30
-30x=(-30)
x=(-30):(-30)
x=1
D.1-[5(x+2)- 7] = 6(-x-3)
1-[5x+10-7]=(-6x)-18
1-5x-10+7=(-6x)-18
-5x+6x=-18-1+10-7
x=(-16)
E.4-4-[4-(4-x)] = 4
-[4-4+x]=4
-4+4-x=4
-x=4
x=4:(-1)
x=(-4)
F. -x(4+x) +3 = x(7-x) + 5 (x - 9)
-4x-x+3=7x-x+5x-45
-5x+3=6x+5x-45
-5x-6x+5x=(-3)-45
-6x=(-48)
x=(-48):(-6)
x=8