Answer:
x^2-3x=4
x^2-3x-4=0
x^2-4x+x-4=0
x(x-4)+1(x-4)=0
(x+1)(x-4)=0
x=-1,4
x- intercepts in the point (-1,0) and (4,0)
Step-by-step explanation:
 
        
             
        
        
        
It is not necessary that the function decreasing over a given interval always be negative.
A function f(x) (value) decreases as x increases.
This does not mean that value of f(x) is negative.
It can have positive number as range. 
 
        
                    
             
        
        
        
Answer:
(x+5) and (x-7).
Step-by-step explanation:
The given equation is :

We need to write it in factored form.
We know that,
7×5 = 35 and 7-5 = 2
So,

Hence, the required factors are (x+5) and (x-7).