1. Uporząkuj jednomiany .
a) 6x*4x*1/3y
b) -45m^2*0,2m*2m^3
2. Podane wyrażenia przedstaw w postaci sum algebraicznych.
a) ( z - 9 ) ^ 2
b) ( 0 , 7 - w ) ^ 2
c) ( u - 2 i 1/3 ) ^ 2
d) ( pierwiastek z 3 - v ) ^ 2
e) ( 3 y - 3/4 ) ^ 2
f) ( 1,1- 0,3x ) ^ 2
daje naj.
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1.
a) 6x*4x*⅓y= 8x²y
b) -45m²*0,2m*2m³= -18m⁶
2.
a) ( z - 9 )²=z²-18z+81
b) ( 0 , 7 - w )²=0,49-1,4w+w²
c) ( u - 2 ⅓ )²=u²-4⅔u+49/9
d) ( √3 - v )²=3-23v+v²
e) ( 3 y - ¾)²=9y²-4½y+9/16
f) ( 1,1- 0,3x )²=1,21+0,66x+0,09x²
z.1
a) 6x *4x *(1/3)y = 24x^2 *(1/3)y = 8 x^2 *y
b) - 45 m^2 *0,2m * 2m^3 = -45*0,4*m^6 = - 18 m^6
=============================================
z.2
a) ( z - 9)^2 = z^2 - 2*9*z + 9^2 = z^2 - 18 z +81
b) (0,7 - w)^2 = 0,49 - 2*0,7*w + w^2 = 0,49 - 1,4 w + w^2
c) ( u - 2 i 1/3)^2 = = ( u - 7/3)^2 = u^2 - 2*(7/3)*u + (7/3)^2=
= u^2 -(14/3 )*u + 49/9
d) [ p(3) - v]^2 = 3 - 2*p(3)v - v^2
e) (3y - 3/4)^2 = (3y)^2 -2*3y*(3/4) + (3/4)^2 =
= 9 y^2 - 4,5y + 9/16
f) (1,1 - 0,3x)^2 = 1,21 - 2*1,1*0,3 x + (0,3x)^2 =
= 1,21 - 0,66 x + 0,09 x^2