Algebra radical expressions

[joannamartinez]

Could you please help me with this problem? I get only so far than I do not know to finish solving. This is what I have so far: (9) sqrt(50) - (4)sqrt(2) = (9)sqrt(25*2) - (4)sqrt(2)= (9)sqrt(25) *sqrt(2) - (4)sqrt(2) = (9*2)sqrt(2)- (4)sqrt(2) = (14)sqrt(2). I do not know what to do next. Please advise. Thank you.

 

[tkhunny]

(9) sqrt(50) - (4)sqrt(2) =

(9)sqrt(25*2) - (4)sqrt(2) = <== Good.

(9)sqrt(25) *sqrt(2) - (4)sqrt(2) = <== Good.

(9*2)sqrt(2)- (4)sqrt(2) = <== Whoops. sqrt(25) = 5

 

[joannamartinez]

I don't completely understand. Is this part not correct at all (9*2)sqrt(2)- (4)sqrt(2)? You stated sqrt(25) = 5. Where does it fit in? I am sorry. I am trying to learn this. I appreciate your help and patience. Thank you.

 

[joannamartinez]

I went back and worked (9)sqrt(25) *sqrt(2) - (4)sqrt(2) and came up with (41)sqrt(2). Is this the correct answer?

 

[Deleted member 4993]

I went back and worked (9)sqrt(25) *sqrt(2) - (4)sqrt(2) and came up with (41)sqrt(2). Is this the correct answer?

Looks good to me.....