Question

ВСЕ НА СКРИНЕ ДАЮ 30 ЬАЛОВ

Answer 1

Ответ:

1) х=5/4

2)х=-2

3)х=2

Объяснение:

Удачки!!)

Answer 2

Ответ:

$(x - 2) ^{2} - (x - 1)(x + 1) = 0 \\ x^{2} - 4x + 4 - ( {x}^{2} - 1) = 0 \\ {x}^{2} - 4x + 4 - {x}^{2} + 1 = 0 \\ - 4x + 5 = 0 \\ - 4x = - 5 \\ x = \frac{5}{4} = 1 \tfrac{1}{4} = 1.25$

$(x + 3) ^{2} + (2 - x)(x + 2) = 1 \\ {x}^{2} + 6x + 9 + (2 - x)(2 + x) = 1 \\ {x}^{2} + 6x + 9 + 4 - {x}^{2} = 1 \\ 6x + 13 = 1 \\ 6x = - 12 \\ x = - 2$

$(2x + 1) ^{2} - 3(x - 5) = (x + 3)(x - 3) + 3 \\ {4x}^{2} + 4x + 1 - 3( {x}^{2} - 10x + 25) = {x}^{2} - 9 + 3 \\ {4x}^{2} + 4x + 1 - 3 {x}^{2} + 30x - 75 = {x}^{2} - 6 \\ {x}^{2} + 34x - 74 = {x}^{2} - 6 \\ 34x = - 6 + 74 \\ 34x = 68 \\ x = 2$