Помогите пожалуйста!!!!!!!!!!!!!!!!!!!!

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20 просмотров

Помогите пожалуйста!!!!!!!!!!!!!!!!!!!!


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Алгебра (18 баллов) | 20 просмотров
Дан 1 ответ
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1)
(2x - 1)(2x + 1) = x(2x + 3)
4 {x}^{2} - 1 - x(2x + 3) = 0
4 {x}^{2} - 1 - 2 {x}^{2} - 3x = 0
2 {x}^{2} - 3x - 1 = 0
2)
{(3x + 2)}^{2} = (x + 2)(x - 3)
3 {x}^{2} + 12x + 4 - {x}^{2} + 3x - 2x \\ + 6 = 0
2 {x}^{2} + 13x + 10 = 0
3)
(x + 1)(x + 2) = (2x - 1)(x - 2)
{x}^{2} + 2x + x + 2 - \\ 2 {x}^{2} + 4x + x - 2 = 0
- {x}^{2} + 8x + 0 = 0
{x}^{2} - 8x = 0
4)
4 {x}^{2} - 2x(3x + 1) = 5
4 {x}^{2} - 6 {x}^{2} - 2x - 5 = 0
- 2 {x}^{2} - 2x - 5 = 0
2 {x}^{2} + 2x + 5 = 0
5)
(x + 3)(3x - 2) = (4x + 5) \times \\ (2x - 3)
3 {x}^{2} - 2x + 9x - \\ 6 - 8 {x}^{2} + 12x - 10x + 15 = 0
- 5 {x}^{2} - 9x + 9 = 0
5 {x}^{2} + 9x - 9 = 0
6)
{x}^{2} + (1 - x)(1 - 3x) = x
{x}^{2} + 1 - 3x - x + 3 {x}^{2} - x = 0
4 {x}^{2} - 5x + 1 = 0

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