lbussie lbussie

23-04-2017
Mathematics

contestada

Given that g(x)=x^2-4x-5, find (g*g) (-2)

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tshiamiso tshiamiso

23-04-2017

the first question...the answer is 10

see;x is our unknown number

so;27-2=25

x + 15=25

x = 25-15

x =10

10 + 15 = 25

25 + 2 = 27

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ghanami ghanami

23-04-2017

hello :
(gog)(-2) = g(g(-2))
but g(-2) = (-2)²-4(-2)-5 =4+8-5=7
(gog)(-2) = g(g(-2)) =g(7) = 7²-4(7)-5 =49-33 =16

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