Add $ \, \color{blue}{ 7+8i } \, $ and $ \, \color{orangered}{ 2+6i }$.
Answer
$$ \left( \color{blue}{7+8i} \right) + \left( \color{orangered}{2+6i} \right) = 14i+9 $$
Explanation
Step 1: First we have to write polynomials in descending order.
$$ \begin{aligned} P(x) &= 8i+7 \\ Q(x) &= 6i+2 \\ \end{aligned} $$Step 2: Write second polynomial below the first one. Making sure like terms are lined up.
$$ \begin{array}{lrr} & 8i & 7 \\ \color{blue}{ + } & 6i & 2 \\ \hline \end{array} $$Step 3: Combine like terms (add each column):
$$ \begin{array}{lrr} & 8i & 7 \\ \color{blue}{ + } & 6i & 2 \\ \hline & 14i & 9 \end{array} $$This page was created using
Polynomial Operations Calculator