Which value of k
will make the equation 2x^2 + kx + 1 = 0
have two real solutions?
A. k = 1
B. k = -4
C. k. =2
D. k = -2
The relation h = —4.9t^2 + 120t + 3
defines the height of a rocket, where h
is the height in
metres and t
is the time in seconds following its launch. If you want to determine how long the rocket was in flight, what must you do?
A. Determine the vertex.
B. Substitute t = 0
, and solve for h
.
C. Complete the square.
D. Determine the zeros of the relation.
Which quadratic relations have x = 3 as the axis of symmetry?
A. y = 4(x -3)^2 + 6
B. y = -2(x -5)(x -1)
C. y = x^2 - 6x + 7
D. All of the above