Question

If (x + a) is a factor of 2x + ax = 5x + 10. Find a?​

Answer 1

Answer:

Given f(x)=2x  

2

+2ax+5x+10

g(x)=x+a

x+a=0

x=−a

f(−a)=2(−a)  

2

+2a(−a)+5(−a)+10

⇒+2a  

2

−2a  

2

−5a+10=0

⇒5a=10

⇒a=  

5

10

​  

 

∴a=2

Answer 2

Answer:

3

Step-by-step explanation:

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