15 - 21 - 12 = 0 = 30 - 2n - 12 = 0 2
18 - 2n=0= = 9.
Hence, m = 15 and 1 = 9
2
Exercise 5.1
1. In each of the following, determine whether the given numbers are roots of the given
equations or not
2
3
(1) 2 - 5x + 6 = 0; 2.-3
(11) 3x2 - 13x - 10 = 0; 5.
2. In each of the following, determine whether the given numbers are solutions of the
given equations or not:
(i) x2 - 313x + 6 = 0; 13.-203 (ii) x2 - 2x - 4 = 0; -12,212
3.
(6) IT - is a solution of the equation 3r? + 2kar - 3 = 0, find the value of k.
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