Asked by Robert
Use the matrix method to solve
5x+3y=35
3x-4y=-8
5x+3y=35
3x-4y=-8
Answers
Answered by
Damon
http://www.gregthatcher.com/Mathematics/GaussJordan.aspx
in the end
1 0 4
0 1 5
in the end
1 0 4
0 1 5
Answered by
Damon
check
20 + 15 = 35
12 - 20 = -8 whew !
20 + 15 = 35
12 - 20 = -8 whew !
Answered by
Damon
another matrix way with determinants
det of
5 3
3 -4 = -20 -9 = -29
for y put column 3 in for col 2
det of
5 35
3 - 8 = -40 - 105 = -145
-145 / -29 = 5 which is y
det of
5 3
3 -4 = -20 -9 = -29
for y put column 3 in for col 2
det of
5 35
3 - 8 = -40 - 105 = -145
-145 / -29 = 5 which is y
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