Page 87 - DMTH201_Basic Mathematics-1

Basic Mathematics – I

Notes
1 4 5
Example: Find the value of x: 2 x 0 0
3 5 8

Solution:

1 4 5
2 x 0 0
3 5 8

1(8x 0) 4(16 0) 5(10 3 ) 0
x
8x 64 50 15x 0
7x 14 0

7x 14

x 2

2 1 x
Example: Find the value of x if 0 1 5 is singular.
1 3 1

Solution:

2 1 x 2 1 x
0 1 5 is singular 0 1 5 0
1 3 1 1 3 1

2( 1 15) 1(0 5) x (0 1) 0

32 5 x 0
x 37

x 2 2
Example: Find x if 2 x 2 0.
2 2 x

Solution:

x 2 2
2 x 2 0
2 2 x

x (0 4) 2(2x 4) 2(4 0) 0

4x 4x 8 8 0

8x 16 0 x 2

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