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Find all zeros of the polynomial 2x^4 + 7x^3 − 19x^2 − 14x + 30, if two of its zeros are √2 and −√2.

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Find all zeros of the polynomial 2x4 + 7x3 − 19x2 − 14x + 30, if two of its zeros are √2 and −√2.

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Other zeroes are:

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