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OpenStudy (anonymous):
matrices to solve systems of equations! help! -2x-2y=8 5x+2y=-2.
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OpenStudy (anonymous):
?
jimthompson5910 (jim_thompson5910):
The coefficients on the left side form a 2x2 matrix
jimthompson5910 (jim_thompson5910):
what you do is you find the inverse of that matrix, then you multiply the left side of the vector 8 over 2 by this inverse to get your answer
OpenStudy (anonymous):
OK..
OpenStudy (anonymous):
DONT I NEED 1O1O?
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jimthompson5910 (jim_thompson5910):
what do you mean?
OpenStudy (anonymous):
like, for it to be correct it needs to be 0,1_0,1
jimthompson5910 (jim_thompson5910):
oh you don't need the identity matrix, but you could use it to find the inverse
OpenStudy (anonymous):
thxx.
jimthompson5910 (jim_thompson5910):
np
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