Question

plzz tell gyus this all questions ​

Answer 1

13.

6x² + 11x + 3 = 0

6x² + 9x + 2x + 3 = 0

3x(2x + 3) + 1(2x + 3) = 0

(3x + 1) (2x + 3) = 0

x = -1/3 or x = -3/2

14.

6x² + x -12 = 0

6x² + 9x - 8x - 12 = 0

3x(2x + 3) - 4(2x + 3) = 0

(3x - 4) (2x + 3) = 0

x = 4/3 or x = -3/2

15.

3x² - 2x - 1 = 0

3x² - 3x + x - 1 = 0

3x(x - 1) + 1(x - 1) = 0

(3x + 1) (x - 1) = 0

x = -1/3 or x = x = 1

16.

4x² - 9x = 100

4x² - 9x - 100 = 0

4x² - 25x + 16x - 100 = 0

x(4x - 25) + 4(4x - 25) = 0

(x + 4) (4x - 25) = 0

x = -4 or x = 25/4