Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
Which of the following quadratic polynomials will touch the
x
x
x
-axis at exactly one point? a)
x
2
+
4
x
+
5
x^2+4x+5
x
2
+
4
x
+
5
b)
x
2
+
4
x
+
1
x^2+4x+1
x
2
+
4
x
+
1
c)
4
x
2
+
4
x
+
1
4x^2+4x+1
4
x
2
+
4
x
+
1
d)
2
x
2
−
3
x
+
1
2x^2-3x+1
2
x
2
−
3
x
+
1
Browse the problem library