book Maths Puzzle Numerical Ability

solve

(-6x^4+3x^2-16) + (4x^2+4x-7)

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book Other Question

My teacher told me to write expressions that equal all of the numbers from 1 to 100 using only the digits 2006. Need help with the following:

Suppose that a polynomial function of degree 4 with rational coefficients has -1, 0, and 2 - 3i as zeros. What is the remaining zero?