Answer:
(i)
On comparing
corresponding elements, we get
4 = y; 3 = z; x
= 1
x = 1, y = 4
and z = 3
(ii) =
On comparing
corresponding elements, we get
x + y = 6; 5 + z
= 5 and xy = 8 ?.. (i)
y = 6 ? x and
z = 0
Putting y = 6 ?
x in (1), we get
x(6 ? x) =
8
6x ? x2
= 8
x2
? 6x + 8 = 0
(x ? 4) (x ?
2) = 0
x = 4, 2
x = 4
x = 2
y =- 6 ? x = 6 ?
4 = 2y = 6 ? x = 6 ? 2 = 4
z = 0 z
= 0
x = 4, y = 3,
z = 0 x = 2, y = 4, z = 0
(iii)
On comparing
corresponding elements, we get
x + y + z = 9; x
+ z = 5 and y + z = 7
and x + 7 = 9
Also, x + y + z
= 9
2 + 4 + z = 9 z = 9 ? 6 = 3
x = 2, y = 4
and z = 3.
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