Question

how to do factorisation with the method of midterms


I need complete steps​

Answer 1

Step-by-step explanation:

(1) 2x² + 7x + 3

2x² + (6+1)x + 3

2x² + 6x + x + 3

2x(x + 3).+1(x + 3)

(2x + 1)(x + 3)

2x + 1 = 0 or x + 3 = 0

x = -1/2 or -3

(2) 3x² - x - 4

3x² -(4-3)x - 4

3x² - 4x + 3x - 4

x(3x - 4).+1(3x - 4)

(x + 1)(3x - 4)

x = -1 or 4/3

(3) 12x² - 7x + 1

12x² - (4+3)x + 1

12x² - 4x - 3x + 1

4x(3x - 1).-1(3x - 1)

(4x - 1)(3x - 1)

x = 1/4 or 1/3