Quadratic expressions Flashcards
1
Q
What is the highest power of ‘x’ if this is a quadratic expression?
axn+bx+c
A
The term is quadratic as long as the highest power of x is 2
2
Q
If a = 0 in the expression
ax2 + bx + c
is this still a quadratic equation?
A
No, if a = 0
it becomes a linear equation
3
Q
Is the following expression quadratic?
5 + x + 3x2
A
Yes, it’s ok to express it the other way round.
What is important is that the highest power of x is 2
4
Q
Is the following expression quadratic?
2x3 + x2 + x +1
A
No, the highest power of x is 3 here.
5
Q
Is the following expression quadratic?
2x2 + x
A
Yes, it is not required to have a constant.
6
Q
Is the following expression quadratic?
2x2 - 1
A
Yes, it is not required to have an “x” value. I just means that b=0.
