AccidentalAiChan
  • AccidentalAiChan
if g(x) = x2 − 3, find g(4).
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
plug in 4 for x
anonymous
  • anonymous
g(x)=x^2+3 g(4)= 4^2+3=16+3 g(4)=19 (I believe)
anonymous
  • anonymous
@Bella<3 you copied down the function incorrectly

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anonymous
  • anonymous
your work is correct though
AccidentalAiChan
  • AccidentalAiChan
I forgot to mention, I am looking for a step-by-step explanation ^^''
anonymous
  • anonymous
Dang lol sorry lol
calculusxy
  • calculusxy
g(4)=4^2-3 16-3=13 13
AccidentalAiChan
  • AccidentalAiChan
@calculusxy, where did you get \[4^{2}\] ?
anonymous
  • anonymous
under the assumption that x2 = x^2
AccidentalAiChan
  • AccidentalAiChan
Oh, I see.
anonymous
  • anonymous
if you meant it as multiplication, then its easier to display the number before the variable like so 2x
AccidentalAiChan
  • AccidentalAiChan
Ah... I meant to be multiplying x by 2
anonymous
  • anonymous
regardless, once you have made the substitution of x=4, you just follow order of operations otherwise known as pemdas or bodmas
AccidentalAiChan
  • AccidentalAiChan
This is my work: g(4) = 4 x 2 - 3 g(4)= 8 - 3 g(4) = 5 ? What am I doing wrong?
anonymous
  • anonymous
nothing? your work looks fine as is
AccidentalAiChan
  • AccidentalAiChan
Oh, Okay Thanks so much!
anonymous
  • anonymous
no problem
calculusxy
  • calculusxy
But aren't you supposed to square 4?
calculusxy
  • calculusxy
@AccidentalAiChan
AccidentalAiChan
  • AccidentalAiChan
No, x2 is x times 2, not x squared
anonymous
  • anonymous
x2 is a completely valid method of writing 2 * x however it is often used as x^2 simply because people do not realize that the carrot "^" is used to denote exponents, which is why when people write down quadratic equations, it is often missing the ^ @calculusxy

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