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(gof)= 12x/4x+20 +1
(gof) (-2)= -24/-8+20 +1
= -24/12 +1
= -2+1
= -1
= 4(3x/(x+5)) + 1
= 12x/(x+5) + 1
(g o f)(-2)
= (12(-2))/(-2+5) +1
= -24/3 +1
= -8+1
= -7