Math factoring

Solve the following problem by factoring. 

88) −x² + x + 12 = 0

For the factoring problem, be sure you show all steps to the factoring and solving. Show a check of your solutions back into the original equation.

46) Solve the following problem by using the quadratic formula.

For the Quadratic Formula problem, be sure that you use readable notation while you are working the computational steps. Refer to Inserting Math Symbols for guidance with formatting.