algebra
posted by reuben .
^440 squareroot (a+b)^440
my answer: a+b
add. squareroot 7a + 4 squareroot 28a^3
?

sqrt(7a) + 4 sqrt(28a^3)
=sqrt (7a) + 4 sqrt(4a^2*7a)
=sqrt(7a) + (4*2a)sqrt*7a)
= (1 + 8a) * sqrt(7a) 
The meaning of what you wrote is unclear. If you meant the 440th root of (a+b)^440, then the answer is a + b. Since this is an evennumbered power,
ab is also an answer.