Please help Simplifying Radical Expressions:

To simply the square root of a number, create a factor tree and any two identical numbers may come out of the radical. Buddy system! If there is no buddy, it must stay under the radical.

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step-by-step explanation:

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step-by-step explanation:

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step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.