The larger value of y for which (y – 1)2 = 4y – 7 is
-
A.
2 -
B.
4 -
C.
6 -
D.
7 -
E.
8
Correct Answer: Option B
Explanation
(y – 1)2 = 4y – 7
y2 – 2xy + 1 = 4y – 7
y2 – 6y + 8 = 0
(y – 4)(y – 2)
y = 4 or 2 = 4
(y – 1)2 = 4y – 7
y2 – 2xy + 1 = 4y – 7
y2 – 6y + 8 = 0
(y – 4)(y – 2)
y = 4 or 2 = 4