Question 76365
The given expression is: 


{{{ x^2 - 7x + 12 = 0 }}}



The last term is 12 and it can be factored as 3 * 4


Hence, the expression can be written as: 


{{{ x^2 - 4x - 3x + 12 = 0 }}} 


Grouping the terms, we get: 


{{{ x(x - 4) - 3(x - 4)= 0}}} 


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


==> x - 4 = 0 OR x - 3 = 0 


==>  x = 4 OR x = 3 


Hence, the solution.