Agl202
  • Agl202
Check my asnwer... MEDAL!!! If x = −4 is a zero of the polynomial function f(x) = 2x3 + 13x2 + 23x + 12, which of the following is another zero of f(x)? x = 4 x = −1 x = 1 x = 12 My answer is A. x=4
Mathematics
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SOLVED
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katieb
  • katieb
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superdavesuper
  • superdavesuper
A zero of the polynomial function means f(A)=0 the Q says f(-4)=0 but is f(4) equal to zero too? if not, then x=4 is not a zero.
Agl202
  • Agl202
So, A isn't correct?
Pawanyadav
  • Pawanyadav
No ,

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superdavesuper
  • superdavesuper
f(4) is not equal to 0 so A is not correct :)
Agl202
  • Agl202
K
superdavesuper
  • superdavesuper
test other choice to see if f(_)=0 perhaps?
Pawanyadav
  • Pawanyadav
Easy method:- As all term are positive but you have to cancelled them all to get 0 So you have to put some negative value And therethere is only one negative and that is -1

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