ashontiera22 ashontiera22

23-03-2017
Mathematics

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Need help with theses questions please

Need help with theses questions please class=

Verified Answer :

ghanami ghanami

23-03-2017

Hello:
3x²+5x+2=0
delta = (5)²-4(3)(2)=1
x =( -5 ±1)/6
x= -2/3 or x=-1

t4-81=(t²)² -9² = (t²-9)(t²+9) =(t-3)(t+3)(t²+9)....(answer B)

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