The length and width of a rectangle is represented by \(2x +1\) and \(x + 3\) respectively. If the area of a rectangle is the length times the width, find the area of this rectangle.

\(\displaystyle{3x+4}\) | |

\(\displaystyle{3x^2+5x+3}\) | |

\(\displaystyle{2x^2 + 5x +3}\) | |

\(\displaystyle{2x^2 +7x +3}\) | |

\(\displaystyle{2x^2 +6x + 3}\) |

After watching the video, try this problem to practice more.

The length and width of a rectangle is represented by \(x – 4\) and \(3x + 2\) respectively. Find the area of this rectangle.

\(\displaystyle{3x^2-10x-8}\) | |

\(\displaystyle{4x-2}\) | |

\(\displaystyle{4x^2+5x-8}\) | |

\(\displaystyle{3x^2-14x-8}\) | |

\(\displaystyle{3x^2-10x-2}\) |