Respuesta :

lexydoc
the answer is 4x^2+5x-21, you multiply x by 4x, then x by -7, 3 by 4x and 3 by -7, you simplify and here you go :)

Answer:

[tex]4x^2+5x-21[/tex]

Step-by-step explanation:

We have been given the length an width of a rectangle. We are asked to find the area of the rectangle.

[tex](x+3)(4x-7)[/tex]

Using FOIL, we will get:

[tex]x(4x-7)+3(4x-7)[/tex]

[tex]4x^2-7x+12x-21[/tex]

[tex]4x^2+5x-21[/tex]

Therefore, the area of the rectangle would be [tex]4x^2+5x-21[/tex].

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