Question

Помогите пж с 2 и 4 плочу много балов

Answer 1

Ответ:

2.

$1) \: {y}^{2} - 5y = 0 \\ y(y - 5) = 0 \\ y = 0 \: ili \: y - 5 = 0 \\ y1 = 0 \: \: \: y2 = 5$

$2) \: 12 {x}^{2} - x = 0 \\ x(12x - 1) = 0 \\ x = 0 \: ili \: 12x - 1 = 0 \\ x1 = 0 \: \: \: x2 = \frac{1}{12}$

3.

$1) \: a(m + n) - b(m + n) = (m + n)(a - b) \\ 2) \: 2m(a - b) + 3n(b - a) = 2m(a - b) - 3n(a - b) = (a - b)(2m - 3n) \\ 3) \: {(a - 4)}^{2} - 5(a - 4) =(a - 4)((a - 4) - 5) = (a - 4)(a - 9)$

4.

$1) \: x(4x + 3) - 5(4x + 3) = 0 \\ (4x + 3)(x - 5) = 0 \\ 4x + 3 = 0 \\ x = - \frac{3}{4} \\ x - 5 = 0 \\ x = 5$

$2) \: x(x - 4) - (4 - x) = 0 \\ x(x - 4) + (x - 4) = 0 \\ (x - 4)(x + 1) = 0 \\ x - 4 = 0 \\ x = 4 \\ x + 1 = 0 \\ x = - 1$

Answer 2

4. 1) х(4х+3)-5(4х+3)=0
(4х+3)(х-5)=0
4х+3=0
х-5=0
х=−0,75; 5
2) x(x-4)-(4-x)=0
(x-4)(x+1)=0
x-4=0
x+1=0
x=4;-1

2. 1) y^2-5y=0
y(y-5)=0
y=0
y-5=0
y=0;5
2) 12x^2-x=0
x(12x-1)=0
x=0
12x-1=0
x=0;1/12

1/12 это дробь
:)