# Arrows between parts of two brackets

Source:

Better solution to display the Distributive Property

Question:

When i came across the answer given by Peter Grill,

i am very interesting to know that how we can extend(modify) this codes for this type of multiplication (a+b)(c+d)=ac+ad+bc+bd

I mean how can we draws arrows between the parts of these two brackets.

I tried lot at my best level but couldn't find the appropriate corrections.

CODE:

\documentclass{article}
\usepackage{amsmath}
\usepackage[dvipsnames]{xcolor}
\usepackage{tikz}
\usetikzlibrary{calc,shapes}

\newcommand{\tikzmark}[1]{\tikz[overlay,remember picture] \node (#1) {};}
\newcommand{\DrawBox}[2]{%
\begin{tikzpicture}[overlay,remember picture]
\draw[->,shorten >=5pt,shorten <=5pt,out=70,in=130,distance=0.5cm,#1] (MarkA.north) to (MarkC.north);
\draw[->,shorten >=5pt,shorten <=5pt,out=50,in=140,distance=0.3cm,#2] (MarkA.north) to (MarkB.north);
\end{tikzpicture}
}
\begin{document}
\LARGE
$\tikzmark{MarkA}(a+b)(c\tikzmark{MarkB}+d\tikzmark{MarkC})=ac+ad+bc+bd \DrawBox{OrangeRed,distance=1cm,in=110,shorten >=10pt}{Cerulean,out=115,in=70,distance=1.5cm}$

\end{document}

• No problem, you can show us what you tried and we will help you to correct it. – Ignasi Jun 27 '16 at 8:34

\documentclass{article}
\usepackage{amsmath}
\usepackage[dvipsnames]{xcolor}
\usepackage{tikz}
\usetikzlibrary{calc,shapes}

\newcommand{\tikzmark}[1]{\tikz[overlay,remember picture] \node (#1) {};}

\begin{document}
$(\tikzmark{MarkA}a+\tikzmark{MarkB}b)(c\tikzmark{MarkC}+d\tikzmark{MarkD})=ac+ad+bc+bd \begin{tikzpicture}[overlay,remember picture] \draw[->,shorten >=5pt,shorten <=5pt,out=70,in=110,distance=0.75cm,OrangeRed,] (MarkA.north) to (MarkD.north); \draw[->,shorten >=5pt,shorten <=5pt,out=60,in=110,distance=0.5cm,Cerulean] (MarkA.north) to (MarkC.north); \draw[->,shorten >=1pt,shorten <=2pt,out=-70,in=-110,distance=0.5cm,OrangeRed,] (MarkB.south) to (MarkD.south); \draw[->,shorten >=1pt,shorten <=2pt,out=-60,in=-110,distance=0.25cm,Cerulean] (MarkB.south) to (MarkC.south); \end{tikzpicture}$

\end{document}


• IT LOOKS NICE..... IT WORKS MILLION THANKS TO YOU – Maths4Sandy Jun 27 '16 at 11:11