anonymous
  • anonymous
Calculate the value of the expression - x^2 + 2 x given that x = 3.13.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
Is it \[-x^2+2x\]or\[x^2+2x\]?
anonymous
  • anonymous
just substitute and you'll get approximately-3.5369
anonymous
  • anonymous
In either case, you substitute 3.13 for x:\[(3.13)^2+2(3.13)=16.0569\]

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anonymous
  • anonymous
for the positive case
anonymous
  • anonymous
I think she meant the first one loki :)
anonymous
  • anonymous
yeah, i think you're right
anonymous
  • anonymous
there is a minus infront
anonymous
  • anonymous
you just sub. 3.13 into each x and perform the operation - you should get sstarica's answer
anonymous
  • anonymous
so, if it says -x^2, and x is 3.13, do i write it like -(3.13^2) or -3.13^2 ?
anonymous
  • anonymous
you have to substitute x first and the minus stays outside, then after getting the answer mulitply it with minus.
anonymous
  • anonymous
-(3.13)^2 = -(9.7969) = -9.7969 and so on. :)
anonymous
  • anonymous
thanks
anonymous
  • anonymous
np :)

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