Respuesta :

The first question's answer is the second choice. The second question's answer is the first choice. The third question's answer is the second choice.
Part 1: [tex]Expand \ 7x(x+4)[/tex] 

[tex]7x*x+7x*4[/tex]    [tex]Distribute[/tex] 

[tex]Use \ Product \ Rule[/tex]    [tex]x^ax^b=x^a^+^b[/tex] 

[tex]7x^2+7x*4 [/tex] 

[tex]7x^2+28x [/tex] 


Part 2: [tex]4x(2x^3-7x^2+x)[/tex] 

[tex] 4x*2x^3+4x*-7x^2+4x*x [/tex]      [tex]Distribute[/tex] 

[tex]4*2xx^3+4x*-7x^2+4x*x[/tex] 

[tex]Use \ Product \ Rule[/tex]    [tex]x^ax^b=x^a^+^b[/tex] 

[tex]4*2x^1^+^3+4x*-7x^2+4x*x [/tex] 

[tex] 4*2x^4+4x*-7x^2+4x*x [/tex] 

[tex]8x^4-4*7xx^2+4x*x[/tex]   [tex]Gather \ like \ terms[/tex] 

[tex]8x^4-4*7x^1^+^2+4x*x[/tex] 

[tex]8x^4-4*7x^3+4x*x[/tex] 

[tex]8x^4-28x^3+4x*x[/tex] 

[tex]8x^4-28x^3+4x^2[/tex]


Part 3: [tex]The \ largest \ number \ that \ divides \ evenly \ into \ 12x \ and \ 20 \ is \ 4. [/tex] 

[tex]GCF = 4[/tex]


Hence Solved