I need help please plot it.

Simplify 4 square root of 2 end root plus 7 square root of 2 end root minus 3 square root of 2 . (1 point) 2 square root of 8 8 square root of 2 8 square root of 6 6 square root of 8

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Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x