Question

nhờ các bạn giúp từ câu 1- 10 thôi là được

Answer 1

1: \(x^2-5x+6=\left(x-2\right)\left(x-3\right)\)

2: \(x^2+5x+6=\left(x+2\right)\left(x+3\right)\)

3: \(x^2-7x+12=\left(x-3\right)\left(x-4\right)\)

4: \(x^2+7x+12=\left(x+3\right)\left(x+4\right)\)

5: \(x^2+x-12=\left(x+4\right)\left(x-3\right)\)

Answer 2

6. x² - x - 12

<=> x² - 4x + 3x - 12

<=> x(x - 4) + 3(x - 4)

<=> (x + 3)(x - 4)

7. x² - 9x + 20

<=> x² - 4x - 5x + 20

<=> x(x - 4) - 5(x - 4)

<=> (x - 5)(x - 4)

8. x² + 9x + 20

<=> x² + 4x + 5x + 20

<=> x(x + 4) + 5(x + 4)

<=> (x + 5)(x + 4)

9. x² + x - 20

<=> x² - 4x + 5x - 20

<=> x(x - 4) + 5(x - 4)

<=> (x + 5)(x - 4)

10. x² - x - 20

<=> x² - 4x + 5x - 20

<=> x(x - 4) + 5(x - 4)

<=> (x + 5)(x - 4)

Answer 3

11. 2x² - 3x - 2

<=> 2x² + x - 4x - 2

<=> x(2x + 1) - 2(2x + 1)

<=> (x - 2)(2x + 1)

12. 3x² + x - 2

<=> 3x² + 3x - 2x - 2

<=> 3x(x + 1) - 2(x + 1)

<=> (3x - 2)(x + 1)