JAMB - Mathematics (1984 - No. 33)

The larger value of y for which (y - 1)2 = 4y - 7 is
2
4
6
7
8

Explanation

(y - 1)2 = 4y - 7

y2 - 2xy + 1 = 4y - 7

y2 - 6y + 8 = 0

(y - 4)(y - 2)

y = 4 or 2 = 4

Comments (0)

Advertisement