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Объяснение:

смотри объяснение на фото

Ответ:

1) x = 0

2) x = {-3; 0}

3) x = 0

4) x = {0; 0,3}

5) x = {-0,5; 0,5}

6) x = {-3; 3}

7) x = {-9; 9}

8) x = {0; 9}

Объяснение:

1)

[tex]4 {x}^{2} = 0 \\ {x}^{2} = 0 \\ x = 0[/tex]

2)

[tex]5 {x}^{2} + 15x = 0 \\ x(5x + 15) = 0 \\ x 1= 0 \\ x 2= - 3[/tex]

3)

[tex] \sqrt{3} {x}^{2} = 0 \\ {x}^{2} = 0 \\ x = 0[/tex]

4)

[tex]20 {x}^{2} - 6x = 0 \\ x(20x - 6) = 0 \\ x1 = 0 \\ x 2= 0.3[/tex]

5)

[tex]4 {x}^{2} - 1 = 0 \\ 4 {x}^{2} = 1 \\ {x}^{2} = \frac{1}{4} \\ x1 = \frac{1}{2} = 0.5 \\ x2 = - \frac{1}{2} = - 0.5[/tex]

6)

[tex]9 - {x}^{2} = 0 \\ {x}^{2} = 9 \\ x 1 = 3 \\ x2 = - 3[/tex]

7)

[tex] {x}^{2} - 81 = 0 \\ {x}^{2} = 81 \\ x1 = 9 \\ x2 = - 9[/tex]

8)

[tex]9x - {x}^{2} = 0 \\ x(9 - x) = 0 \\ x1 = 0 \\ x2 = 9[/tex]