Question

rozwiąż nieróność

1. (3-x)² - (x + ⅓) ²= 2/9

2. 4 (1/2x - 3) ² - (2-x) ²= 0

3. (x-3) = 5

4. x ² - 16 = 0

5. 2x²- 72 = 0

6. x² +2 = 0

7. x²- 7 = 0

8. x² + 6 = 0

Answer 1

1. (3-x)² - (x + ⅓) ²= 2/9

    9x-1/4x=2/9

     9i1/4x=2/9

     x=37/4:2/9

     x=37/4*9/2

     x=333/8

     x=41i 5/8

 

Mam nadzieje, że jest dobrze rozwiązane...;D

Answer 2

(3-x)² - (x + ⅓) ²= 2/9

9-6x+x²- (x²+2/3x+1/9)=2/9

9-6x+x²-x²-2/3x-1/9=2/9

-6x-2/3x=2/9-9+1/9......../*-1

6x+2/3X=-2/9+9-1/9

20/3x=80/9........../:20/3

x=80/9*3/20

x=4/3

x=1 i 1/3

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4 (1/2x - 3) ² - (2-x) ²= 0

4(1/4x²-3x+9)-(4-4x+x²)=0

x²-12X+36-4+4x+x²=0

-8x=-32.........../:-8

x=4

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(x-3) = 5

x=5+3

x=8

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4. x ² - 16 = 0

x²=16

x=4

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5. 2x²- 72 = 0 

2x²=72

x²=36

x=6

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6. x² +2 = 0

x²=-2

brak rozwiązań

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7. x²- 7 = 0

x²=pierwiastek z 7

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8. x² + 6 = 0

to samo co 6

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