1. evaluate the discriminant for each equation, then use it to determine the nature of the roots for each quadratic equation. (a) x^+4x+5=0 (b) x^-4x-5=0 (c) 4x^2+20x+25=0

Given the quadratic equation ax^2 + bx + c = 0, the coefficients of x^2, x and 1 are a, b and c respectively.  

(a) and (b) are not valid quadratics, because they omit the exponent 2.   Rewrite these as comments within your original post, please.

(c) 4x^2+20x+25=0:  Here, a = 4, b = 20 and c = 25.

i get you, what you should do is think of the positive things that would come out of it. it will make yours parents proud and raise your grade. you should always try and if you can't focus tell the teacher.

-1   1/6.   you dont subtract the denominators

step-by-step explanation: