Respuesta :

The area of the triangle. (WHOLE)

[tex](4x+2)(2x-2)=8x^{2} -4x-4[/tex]

The area of the gray square.

[tex](x)(x+1)=x^{2} +x[/tex]

Subtract.

[tex](8x^{2} -4x-4)-(x^{2} +x)\\=7x^{2} -3x-4[/tex]

Hope this helped.

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