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Answer:
Already answered on the other one
Step-by-step explanation:
#1
[tex]\\ \rm\Rrightarrow (gof)(-1)[/tex]
[tex]\\ \rm\Rrightarrow g(f(-1))[/tex]
[tex]\\ \rm\Rrightarrow g(2(-1)^2-(-1))[/tex]
[tex]\\ \rm\Rrightarrow g(2+1)[/tex]
[tex]\\ \rm\Rrightarrow g(3)[/tex]
[tex]\\ \rm\Rrightarrow 3+1[/tex]
[tex]\\ \rm\Rrightarrow 4[/tex]
#2
[tex]\\ \rm\Rrightarrow (fog)(-1)[/tex]
[tex]\\ \rm\Rrightarrow f(g(-1))[/tex]
[tex]\\ \rm\Rrightarrow f(-1+1)[/tex]
[tex]\\ \rm\Rrightarrow f(0)[/tex]
[tex]\\ \rm\Rrightarrow 2(0)^2-0[/tex]
[tex]\\ \rm\Rrightarrow 0[/tex]
#3
[tex]\\ \rm\Rrightarrow (gof)(x)[/tex]
[tex]\\ \rm\Rrightarrow g(f(x))[/tex]
[tex]\\ \rm\Rrightarrow g(2x^2-x)[/tex]
[tex]\\ \rm\Rrightarrow 2x^2-x+1[/tex]
#4
[tex]\\ \rm\Rrightarrow (fog)(x)[/tex]
[tex]\\ \rm\Rrightarrow 2(x+1)^2-x[/tex]
[tex]\\ \rm\Rrightarrow 2(x^2+2x+1)-x[/tex]
[tex]\\ \rm\Rrightarrow 2x^2+4x+2-x[/tex]
[tex]\\ \rm\Rrightarrow 2x^2+3x+2[/tex]
#5
No they are not equal