Roziąż równania .
1.
a)(3x+2)kwadrat =3(3x do kwadratu+5)
b)3x(3x-4)=(3x-2)do kwadratu
c)(jedna druga x - 2)do kwadratu +x=0,25x(x-8)
d)(0,09y-3,6)y=92-0,3y)do kwadratu
2.
(x+2)do kwadratu=xkwadrat
(x+1)do kwadratu =x kwadrat -1
(x+4)do kwardatu =x(6+x)
(3x+2)do kwadratu=x(-2+9x)
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1
A) (3x+2)kwadrat = 3(3x do kwadratu + 5)
9x do kwadratu + 12x+4=9x do kwadratu +15
9x do kwadratu +12x - 9x do kwadratu= 15-4
12x=11 /12
x=11/12
b) 3x(3x-4)=(3x-2)do kwadratu
9x do kwadratu -12x= 9x do kwadratu -12x+4
9x do kwadratu-12x-9x do kwadratu+12x= 4
0=4
c) (jedna druga x - 2)do kwadratu +x=0,25x(x-8)
0,25x do kwadratu - 2x+4+x= 0,25x do kwadratu -2x
0,25x do kwadratu-2x+x-0,25x do kwadratu+2x=-4
x=-4
2,
(x+2)do kwadratu=xkwadrat
x do kwadratu+4x+4= x kwadrat
x do kwadratu+4x-x do kwadratu=-4
4x=-4 /4
x=-1
(x+1)do kwadratu =x kwadrat -1
x do kwadratu+2x+1= x do kwadratu -1
x do kwadratu+2x-x do kwadratu=-1-1
2x=-2 / 2
x=-1
(x+4)do kwardatu =x(6+x)
x do kwadratu+8x+16=6x+x do kwadratu
x do kwadratu+8x-6x-x do kwadratu=-16
x=-16
(3x+2)do kwadratu=x(-2+9x)
9x do kwadratu+12x+4=-2x+9x do kwadratu
9x do kwadratu +12x+2x-9x do kawdratu=-4
14x=-4 / 14
x=-4/14