Answer:
 For The value of a = 0 and c = 0 , The given expression equality is true  
Step-by-step explanation:
Given expression as :
 = a - 2
 = a - 2
Or, 3 a² + ac + 2 c - 6 a = ( a - 2 ) × ( 3 a - c )
Or, 3 a² + ac + 2 c - 6 a =  3 a² - ac - 6 a + 2 c
Or, (  3 a² + ac + 2 c - 6 a ) - ( 3 a² - ac - 6 a + 2 c ) =0 
Or, ( 3 a² - 3 a² ) + ( ac + ac ) + ( 2 c - 2 c ) + ( - 6 a + 6 a ) = 0
or,  0 + 2 ac + 0 
Or, 2 ac = 0
∴  a =0  and c = 0
Hence For The value of a = 0 and c = 0 , The given expression equality is true  .  Answer
 
        
             
        
        
        
Answer:
(x+1) (x-1) (x+2) (x-2)
Step-by-step explanation:
<u>Let u = x^2</u>
= u^2 - 5u + 4
<u>(Factor u^2 - 5u + 4)</u> 
= (u-1) (u-4)
<u>Substitute back u = x^2</u>
= (x^2 -1 ) (x^2 - 4)
<u>Factor x^2 - 1 and x^2 -4</u>
= (x+1) (x-1) (x+2) (x-2)
Hope this helped... :) 
If you need to see the work for yourself, copy/paste this link
https://www.symbolab.com/solver/factor-calculator/factor%20x%5E%7B4%7D%20%E2%88%92%205x%5E%7B2%7D%20%2B%204%20
 
        
                    
             
        
        
        
Answer:
m = 100, t = 80
Step-by-step explanation:
m +  t = 180
6m + 8t = 1240