Question

Zadanie w załączniku 2 albo 3

Answer 1

2.a)  x / 7 = 7 / 3

3x = 49

x = 16 ¹/₄₉

 

b) x / 5 = 9 / 2

2x = 45

x = 22,5

 

c) 3(x+5) / 2 = - ⅓

3x + 15 / 2 = -⅓

9x + 45 = -2

9x = -47

x = -5 ²/₄₇

 

nei ujęło do końca podpunktu d).

 

3. a) y = x/3

0 = x / 3

x = 0

 

b)y - 5x + 4 = 0

0 - 5x + 4 = 0

-5x = -4

x = ⅘

 

c) y = 4x² - 9

0 = 4x² - 9

0 = (2x - 3)(2x+3)

2x - 3 = 0

2x = 3

x = ³/₂

lub x = -³/₂