JAMB - Mathematics (1992 - No. 45)
The sketch is the curve of y = ax2 + bx + c. Find a, b and c respectively
1, 0, -4
-2, 2, -4
0, 1, -4
2, -2, -4
2, -2, -4
설명
Given the graph and the curve y = ax2 + bx + c the roots are x - 2 and 2 while its equation (x + 2)(x - 2) = y
y = x2 - 4 i.e. y = x2 + 0x - 4
a = 1, b = 0 and c = -4
y = x2 - 4 i.e. y = x2 + 0x - 4
a = 1, b = 0 and c = -4