clamin
  • clamin
PLEASE HELP!! MEDAL!! y=1/2x^2-4x+10 please show me the x and y intercept...
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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clamin
  • clamin
i dont know how if theres a fracton
zepdrix
  • zepdrix
Should that be -10 on the far right side?
zepdrix
  • zepdrix
So it looks like this?\[\large\rm y=\frac{1}{2}x^2-4x-10\]

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clamin
  • clamin
its +10 @zepdrix
zepdrix
  • zepdrix
\[\large\rm y=\frac{1}{2}x^2-4x+10\]Ok so like... to find y-intercepts... We want to know where this function intercepts the y-axis. That happens when x=0.\[\large\rm y=\frac{1}{2}\cdot0^2-4\cdot0+10\]So what do you get for your x-intercept? :o
zepdrix
  • zepdrix
For your y-intercept I mean* >.<
zepdrix
  • zepdrix
The 0's should make this step nice and easy.
clamin
  • clamin
10
zepdrix
  • zepdrix
cool first part done \c:/
zepdrix
  • zepdrix
The function will cross the x-axis when the y coordinate is zero. \[\large\rm 0=\frac{1}{2}x^2-4x+10\]I also don't like fractions. I would recommend multiplying both sides by 2.\[\large\rm 2\cdot0=2\cdot\left(\frac{1}{2}x^2-4x+10\right)\]
zepdrix
  • zepdrix
\[\large\rm 0=x^2-8x+20\]Do you understand what that did? :o The left side is still 0, everything on the right doubled.
clamin
  • clamin
yes
clamin
  • clamin
so im gonna use that instead of 1/2??
zepdrix
  • zepdrix
I multiplied by 2 because the fraction had a 2 in the denominator. So no more fraction! Yay! Yes, use this equation instead. Do you remember how to factor and stuff? :)
clamin
  • clamin
yes
clamin
  • clamin
so whatever denominator thats what your gonna multiply to get rid of fractions??
zepdrix
  • zepdrix
Yes! But if you have multiple fractions showing up in the same equation, then it becomes a little trickier. Then you would have to multiply by the Least Common Multiple of those denominators.

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