Tap the blue circles to see an explanation.
$$ \begin{aligned}4h^3+6h^2+1-(5h^2-8h^4+6)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}4h^3+6h^2+1-5h^2+8h^4-6 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}8h^4+4h^3+h^2-5\end{aligned} $$ | |
① | Remove the parentheses by changing the sign of each term within them. $$ - \left( 5h^2-8h^4+6 \right) = -5h^2+8h^4-6 $$ |
② | Combine like terms: $$ 4h^3+ \color{blue}{6h^2} + \color{red}{1} \color{blue}{-5h^2} +8h^4 \color{red}{-6} = 8h^4+4h^3+ \color{blue}{h^2} \color{red}{-5} $$ |