Zadanie w załączniku 2 albo 3
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
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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