anonymous
  • anonymous
Solve the following system of equations and show all work. y = 2x2 y = –3x −1
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
@mathmate
anonymous
  • anonymous
\[y=2.x^{2}\]?
anonymous
  • anonymous
no y=2x^2

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More answers

triciaal
  • triciaal
set the y's equal and solve for x then substitute this value in one of the expressions for y to get the value of y
mathmate
  • mathmate
Use comparison: y=2x^2 y=-3x-1 Since they are both y, they are equal, so put 2x^2=-3x-1, or transposing, solve 2x^2+3x+1=0 (by factoring) to solve the problem.
triciaal
  • triciaal
|dw:1438619700713:dw|
anonymous
  • anonymous
so then would it be 2x^2+3x+1?
triciaal
  • triciaal
equation must be equal to something
anonymous
  • anonymous
\[2.x^{2}+3x+1=0\]
anonymous
  • anonymous
2x^2+3x+1=0
anonymous
  • anonymous
then we could factor right?
triciaal
  • triciaal
yes solve for x
anonymous
  • anonymous
um then i got 1/2 and -1??
triciaal
  • triciaal
|dw:1438619899819:dw|
anonymous
  • anonymous
And then to get the points would we have to plug them back in?
triciaal
  • triciaal
|dw:1438620195735:dw|
anonymous
  • anonymous
so the x intercepts would be -1/2, and -1 correct?
anonymous
  • anonymous
and when i plugged it back in, i got (-0.5,0.5) (-1,2)
triciaal
  • triciaal
checking for arithmetic error above
anonymous
  • anonymous
hahah okay:)
anonymous
  • anonymous
thanks for all ur help!
triciaal
  • triciaal
welcome

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