Question

Factor Completely:

6x^2 + 12x – 21

Answer 1

6x² + 12x - 21
3(2x² + 4x - 7)
2x² + 4x - 7 ⇒ This is the factorised answer


This is how you solve it:

`Solve\ using\ formular \ \ \ \boxed{ x={ (-b\pm √(b^2-4ac) )/(2a) }} \\ x={ (-4\pm √(4^2-4(2)(-7)) )/(2(2)) } \\ x={ (-4\pm √(72) )/(4) } \\ \\ x=1.12132\ \ \ or\ \ \ x=3.12132`