Given quadratic equation : 
Let us apply standard quadratic form 
We know, quadratic formula

a = 4
b = 2
c= -1
Now we plug in all the values in quadratic formula
.
<h3>The above one is the substitution of values of a,b,c in quadratic formula.</h3>
Answer:
The answer is 1 2/3. (One and two thirds)
Step-by-step explanation:
-20 / -12
The negative signs will cross out.
Each number is able to divide by 4.
20 divided by 4 is 5.
12 divided by 4 is 3.
5/3 = 1 2/3
Answer:
<em>The researchers documented 145 medicinal plants that the healers use for treating 59 ailments. They also found that the ethnic group used more than 40 species for treating more than one ailment.</em>

Answer:
35
Step-by-step explanation:
x + 10 = 45
x = 35