Find the number of real number solutions for the equation. x^2 + 9x + 20 = 0

real-number-solution

#1

Find the number of real number solutions for the equation. x^2 + 9x + 20 = 0

Answer:

Quick way of solving a few quadratic equations:
(x+a)(x+b)= x^2+ (a+b)x+ (ab)
In this case, a=4, b=5
Giving: (x+4)(x+5)
x+4=0, x= -4
x+5 =0, x= -5