Question

1..Przekształć iloczyny na sumy.

a) (t-2s-1) * 7

b) m(2m+3)

c)3p (2r+5p-1)

d)xy(2x-3y+5)

2..

a)3/4x=-4/9

b)0,1x=-7

Answer 1

1..Przekształć iloczyny na sumy.

a) (t-2s-1) * 7=7t-14s-7

 

b) m(2m+3)2m²+3m

 

c)3p (2r+5p-1)=6pr+15p²-3p

 

d)xy(2x-3y+5)=2x²y-3xy²+5xy

 

 

2..

a)3/4x=-4/9

x=-4/9*4/3

x=-16/27

 

 

b)0,1x=-7

x=-7*10

x=-70

Answer 2

z.1

a)

( t - 2s - 1)* 7 = 7 t - 14 s - 7

b)

m (2m + 3) = 2 m² + 3 m

c)

3p ( 2r + 5p - 1) = 6 pr + 15 p² - 3p

d)

xy (2x - 3y + 5) = 2x²y - 3xy² + 5xy

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z.2

a) (3/4) x = ( -4/9)    / *(4/3)

x = (-4/9)*(4/3)

x = - 16/27

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b)

0,1 x = - 7   / * 10

x = - 70

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Answer 3

a) (t - 2s - 1) * 7 = 7t - 14s - 7
b) m(2m + 3) = 2m² + 3m
c) 3p(2r + 5p - 1) = 6pr + 15p² - 3p
d) xy(2x - 3y + 5) = 2x²y - 3xy² + 5xy

Zad.2

a)
3/4x = -4/9
3/4x = -4/9|* 3/4
x = -16/27

b)
0,1x = -7
x = 10 * (-7)
x = 70