1) zapisz w najprostszej postaci :
a) 3x(x+5) =
b) 5x^2 (3x+8+2y) =
c) 5(4x-7) + 3(x+2) =
d) 17(a-b) + 16(b-a) =
e) (x+3) (4+y)
f) (3x + 2) (4 + 3x) =
2)
a) (1 1/3)^3 * (-3 3/4)^2 : 3 - (1/3)^2 =
b) (1 3/4)^6 * (2/7)^6 =
c) √81 + 5 + √169 + √100 + √0 =
d) √7 * (√4 + 3) =
3)
jaki promień ma koło o obwodzie 20 cm?
4)uporządkuj jednomiany
a)
2*a*b*4*a^2*(-2)*b =
b)
3*x*y*(-3)*2*y*6=
c)
x+(x+3y+8)
d)
(2a-3b) - (4a+b) =
e)
-x^2 + (x^2 - 2x + 6) =
f)
(a+b+c) - (a+b+c) =
g)
(2a+3b) + (2a+3b) =
5)
rozwiąż układ równań
a)
u=4v
5u-v=10
b)
3m+n=9
2m-5n=-11
c)
x + 3y = 3
x-y=5
d)
2x-y=10
x+5=-17
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1.
a)3x(x+5)=3x²+5x
b)5x²(3x+8+2y)=15x³+40x²+10x²y
c)5(4x-7)+3(x+2)=20x-35+3x+6=23x-29
d)17(a-b)+16(b-a)=17a-17b+16b-16a=a-b
e)(x+3)(4+y)=x+3*4+y=x+12+y
f)(3x+2)(4+3x)=3x+2*4+3x=3x+8+3x=6x+8
2.b) (7/4)⁶*(2/7)⁶=(7/4*2/7)⁶=(1/2)⁶=1/64
5.
u=4v
5u-v=10
u=4v
5*4v-v=10
u=4v
5*3v=10
u=4v
15v=10/:15
u=4v
v=2/3
u=4*2/3
v=2/3
u=8/3
v=2/3
b)
3m+n=9
2m-5n=-11
n=9-3m
2m-5*(9-3m)=11
n=9-3m
2m-45-15m=11
n=9-3m
-13m=11+45
n=9-3m
-13m=56/(-13)
n=9-3m
m=4 4/13
n=9-4 4/13
m=4 4/13
n=117/13-56/13
m=4 4/3
n= 4 9/13
m= 4 4/3
c)
x + 3y = 3
x-y=5
x=3y=3
x=5+y
4y=-2/:4
x=5+y
y=--1/2
x=5-1/2
y=-1/2
x=4 1/2
resztę wyslę ci po 19 jesli pozwolisz ...
Reszta
5d)
2x-y=10
x+5=-17
2x-y=10
x=-22
2*(-22)-y=10
x=-22
-44-y=10
x=-22
-y=10+44
x=-22
-y=54/:(-1)
x=-22
y=-54
x=-22