Verified answer

You have corrected the problem to root4 root7+root4 root7.Actually only similiar surds can be added or subtracted.The rule is that you must take the common first. the process should be root 4 root7(1+1) =2 root 4 root 7 .you can write the answer as 2* 4^ (1/2)*7^(1/2) or as 2* 4 radical 7 radical.Sorry, no root sign is there in my keyboard.

Well first of all, the SQRT(4) = 2.

So, basically, you have....

2(SQRT(7)) + 2(SQRT(7))

With this type of problem, you add the numbers and not the square (treat the square root like a variable).

2(SQRT(7)) + 2(SQRT(7)) = 4(SQRT(7))

it becomes 8√7. just imagine the '√7' is 'x'. you obviously can't add x, you just add the coefficient. it's the same case here, so you just add 4 + 4.

i think u should ask google or yahoo not us cuz damn i noe i cant answer dat or ask google or yahoo for a math helper becasue iv done that b4 and it helps but i forgot wich 1 i used if not i wouldv given it 2 u sorry