SOLUTION: I want to know if I should apply the quadratic eqution formula to this problems: x^2 +3 - 15 =0 and x^2 + x+ 4=0. I' asking so that I'll understand what example to follow in my bo

Question 204139: I want to know if I should apply the quadratic eqution formula to this problems:
x^2 +3 - 15 =0 and x^2 + x+ 4=0. I' asking so that I'll understand what example to follow in my book , you don't have to work it out. I'm just tired of turnoing in my work with the wrong solutions and answers just because I have need to know what example to follow and where to look. I've had it with being wrong and frustrated about all of this.
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
the discriminant of a quadratic tells you if the equation is factorable

(b^2 - 4ac) is the discriminant

if the value is a positive perfect square, then the quadratic is factorable
if not, you need to use the quadratic formula
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