Step-by-step explanation:
4x2+8x−3=0
For this equation: a=4, b=8, c=-3
4x2+8x+−3=0
Step 1: Use quadratic formula with a=4, b=8, c=-3.
x=
−b±√b2−4ac
2a
x= −(8)±√(8)2−4(4)(−3)
2(4)
x= −8±√112
8  x=−1+
1 2 √7 or x=−1+
−1 2 √7
Answer:  x=−1+
1 2√7 or x=−1+
−1 2 √7
 
        
             
        
        
        
Answer:
8 units
Step-by-step explanation:
<u>Area of a rectangle</u> = <em>Width</em> multiplied by Length
Substitute in all the known numbers into this formula to get
<u>72</u> = <em>(9)</em> ×  
 
Solve the equation for x, to find out the length







Length of the rectangle = 


 
        
             
        
        
        
Hope this helps! the answer is option (A). if you still don’t understand after looking at my solution feel free to clarify ya
 
        
        
        
Down on the bottom, under the fraction line.
        
                    
             
        
        
        
Answer:
a
Step-by-step explanation:
20-9=11