Plz algebra 2 will give brainliest 20 points

Question 1

It won't be completely simplified, because 8 can be factored further, so I would say the answer is "no"

A much better factorization would be 
sqrt(72) = sqrt(36*2)
since 36 is the largest perfect square factor of 72

If you're curious how it simplifies, then it would do so like this
sqrt(72) = sqrt(36*2)
sqrt(72) = sqrt(36)*sqrt(2)
sqrt(72) = 6*sqrt(2)

Note: "sqrt" is shorthand for "square root"



Question 2

For monomials like this, we simply cut the exponent in half, or we divide by 2.

28/2 = 14

Therefore, sqrt(x^28) = x^14

The given expression simplifies to x^14

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Do you need with the x value for the minimum? its always between the two intercepts for a parabola