Question

factorise 1/2x²-2x+3​

Answer 1

Answer:

Answer:

8x³ - 36x² + 22x + 21 = (2x + 1)(2x -3)(2x - 7)

x = -1/2

x = 3/2

x = 7/2

Step-by-step explanation:

8x³ - 36x² + 22x + 21

= 8x³ + 4x² - 40x² + 22x + 21

= 8x³ - 4x² - 40x² - 20x + 42x + 21

= 4x²(2x + 1) - 20x(2x + 1) + 21(2x + 1)

= (4x² - 20x + 21)(2x + 1)

= (2x +1) (4x² - 20x + 21)

= (2x + 1) ( 4x² - 6x - 14x + 21)

= (2x + 1) ( 2x(2x - 3) - 7(2x -3))

= (2x + 1)(2x -3)(2x - 7)

8x³ - 36x² + 22x + 21 = (2x + 1)(2x -3)(2x - 7)

x = -1/2

x = 3/2

x = 7/2

Step-by-step explanation: