3x²+x-5=0
a = 3, b = 1, c= -5
-> ∆ ( delta ) = b²-4ac = 61 > 0
-> x1 =( -b+√∆ )÷ 2a =...
x2 = (-b-√∆)÷2a =...
p/s: do your teachers teach you how to use ∆ ( delta ) in maths calculation ? i live in europe and our teachers teach us that way. however, it is a rịght and fast way. you should learn it. 
 
        
             
        
        
        
Answer:
58 I think i'm wrong tho
Step-by-step explanation:
 
        
                    
             
        
        
        
Multiply 250 by 120 and the answer is 300,000ft2
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
ok Jeez calm down
First one is 
Yellow is 1
Green is 4
Which is 1/25
The second pic is C
Hope it helped u
 
        
                    
             
        
        
        
Answer:
64cm2
Step-by-step explanation:
(32÷4)=8
8×8=64cm2