anonymous
  • anonymous
MATRIX: solve for x's:
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
wheres my matrix?
anonymous
  • anonymous
im drawing it
anonymous
  • anonymous
2a -6c=-8 b+2c=3 3a+6b-2c=-4

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anonymous
  • anonymous
i changed the x's to a,b,c so its easier:)PLZ HELP!!!
anonymous
  • anonymous
are you familiar with row operations?
anonymous
  • anonymous
ya
anonymous
  • anonymous
this what your matrix should look like
anonymous
  • anonymous
i did it but i wanna make sure i got the right answers
anonymous
  • anonymous
| 1 0 0 | 19.6 | | 0 1 0 | -7.4 | | 0 0 1 | 5.2 __|
anonymous
  • anonymous
what i got
anonymous
  • anonymous
:(
anonymous
  • anonymous
a=2 b=-1 c=2
anonymous
  • anonymous
wait for some one else to solve it, i could be wrong :)
anonymous
  • anonymous
if you substitute back my answers into the equations they work, so its right.
anonymous
  • anonymous
aight. i give up:(
phi
  • phi
If we start with this matrix 2 0 -6 -8 <--- divide this row by 2 to simplify it 0 1 2 3 3 6 -2 -4 1 0 -3 -4 <--- multiply this row by -3 and add to the 3rd row 0 1 2 3 3 6 -2 -4 1 0 -3 -4 0 1 2 3 0 6 7 8 <--- we added -3 0 9 12 to the 3rd row 1 0 -3 -4 0 1 2 3<---multiply by -6 and add to the 3rd row 0 0 -5 -10 1 0 -3 -4 0 1 2 3 0 0 1 2 <---divided by -5 now back solve
anonymous
  • anonymous
woohooo @phi SO I GOT IT RIGHT???

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