Answer:
The answer is (x + 3) (x - 7) = 0
Step-by-step explanation:
x² - 4x = 21
x² - 4x - 21 = 0
x² - 7x + 3x - 21 = 0
x(x - 7) + 3(x - 7) = 0
(x + 3) (x - 7) = 0
Thus, The answer is (x + 3) (x - 7) = 0
<em><u>-TheUnknownScientist</u></em>
 
        
             
        
        
        
12*123.9=1486.8
plz rate brainlyist
        
             
        
        
        
Answer: 127^9 so 8594754748609400000
Step-by-step explanation: i’m not sure but 4+6 (7x3)-3 = 127 127^9 
 
        
             
        
        
        
Answer:
7.6
Step-by-step explanation:
you just need to multiply 3.8 × 2= 7.6