Respuesta :

govdylan1

Answer:

We can use FOIL to solve this:

F - First

O - Outer

I - Inner

L - Last

[tex] = (x \times x)+(x \times - 7)+(3 \times x)+(3 \times - 7)[/tex]

[tex] = {x}^{2} + - 7x + 3x - 21[/tex]

[tex] = {x}^{2} - 4x - 21[/tex]

Answer:

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

Step-by-step explanation:

[tex]\left(x+3\right)\left(x-7\right)[/tex]

Apply FOIL method:-

[tex]\left(a+b\right)\left(c+d\right)=ac+ad+bc+bd[/tex]

[tex]\left(x+3\right)\left(x-7\right)[/tex]

[tex]xx+x\left(-7\right)+3x+3\left(-7\right)[/tex]

[tex]=x^2-4x-21[/tex]

OAmalOHopeO

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