Question

Factories and solve x^2 +x -12=0

Answer 1

The equation factors into: " (x + 4)(x –3) = 0 " .
____________________________________________________
The solutions are: " x = - 4 " and " x = 3 " .
____________________________________________________
Note:
____________________________________________________

Factors of "-12" that, when added up", equal " +1 " ;

→ { Note: Refer to: "+1x" .}.

- 4, 3 : -4 + 3 = -1

4, -3 : 4 + (-3) = 4 -3 = 1 . Yes!
_______________________________________________
So: " (x + 4)(x –3) = 0 " ; x = - 4, and x = 3 .
_______________________________________________