Fsc Part 1 Mathematics (Complete Solution)
Q3
Find x and y if
(i) |
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SOLUTION:
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using definition of equality of matrices, we have
x+3=2
x=2-3
x=-1
and
3y-1=2
3y=2+1
3y=3
y=1
(ii) |
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= |
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SOLUTION:
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using definition of equality of matrices, we have
x+3=y
x-y=-3 -----------------------------(i)
and
3y-4=2x
2x-3y=-4 ---------------------------(ii)
multiply 2 by (i)
2x-2y=-6 -----------------------------(iii)
subtract (ii) from (iii)
2x-3y-2x+2y= -4+6
-y=2
y=-2
put y=-2 in (i)
x+2=-3
x=-3-2
x=-5