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Add the polynomials (4x2 - 9x + 4) + (7x3 - 9x

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(4x^2-9x+4)+(7x^3-9x)

we remove the parenthesis and add the number that have the same exponent


\begin{gathered} 4x^2-9x+4+7x^3-9x \\ 7x^3+4x^2+(-9x-9x)+4 \\ 7x^3+4x^2-18x+4 \end{gathered}

User Bilal Ahmed
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