Algebra and Quadratic Equations - One Line Questions
1.
If x^2 - 5x + 6 = 0, what is the value of x(x-5)? —
-6
2.
What is the product of the roots of the quadratic equation ax^2 + bx + c = 0? —
c/a
3.
What is the smallest integer value of x for which x^2 - 5x + 6 < 0? —
1
4.
What is the smallest root of the equation x^2 - 4x + 3 = 0? —
1
5.
If x^3 - 1 = 0, what is the real value of x? —
1
6.
If x^2 + 2x + 1 = 0, what is the value of x? —
-1
7.
If x^2 = 100, what is the value of x? —
10, -10
8.
Find the sum of the roots of the equation x^2 - 11x + 30 = 0. —
11
9.
If x + 1/x = 5, what is the value of x^3 + 1/x^3? —
130
10.
What is the sum of squares of the roots of x^2 - 5x + 6 = 0? —
13
11.
What is the value of x^2 - y^2 if x + y = 10 and x - y = 4? —
40
12.
If x + 1/x = 4, what is the value of x^2 + 1/x^2? —
18
13.
If x = 5, what is the value of x^2 - 2x + 1? —
24
14.
If x - 1/x = 3, what is the value of x^3 - 1/x^3? —
36
15.
If x^3 = 8, what is the real value of x? —
2
16.
If x + 1/x = 2, what is the value of x^n + 1/x^n for any positive integer n? —
2
17.
If x^2 - 4 = 0, what is the value of x^2? —
4
18.
If x + y = 11 and x^2 + y^2 = 61, find the value of xy. —
20
19.
If x - 1/x = 5, then what is the value of x^2 + 1/x^2? —
27
20.
If x + y = 7 and xy = 12, find the value of x^2 + y^2. —
25
21.
If x^2 - 9 = 0, what are the values of x? —
3, -3
22.
If x^3 = 27, what is the value of x? —
3
23.
If x^2 + 1/x^2 = 11, what is the value of x + 1/x (assuming x is positive)? —
3
24.
If x = 2 is a root of the quadratic equation x^2 - kx + 8 = 0, find the value of k. —
5
25.
If x^2 + 1/x^2 = 18, and x is positive, find the value of x + 1/x. —
5
26.
What is the value of x if x^2 = 16? —
4, -4
27.
If x^3 = 64, what is the real value of x? —
4
28.
If x^2 - 8x + 16 = 0, what is the value of x? —
4
29.
If x^2 + 1/x^2 = 22, and x is positive, find the value of x + 1/x. —
6
30.
If x + 1/x = 3, then what is the value of x^2 + 1/x^2? —
7
31.
If x^2 + 1/x^2 = 47, find the value of x - 1/x (assuming x > 1). —
5
32.
If x^2 - 10x + 25 = 0, what is the value of x? —
5
33.
If x^2 + y^2 = 25 and x + y = 7, find the value of xy. —
6
34.
If x^2 - 36 = 0, what are the values of x? —
6, -6
35.
If x^2 = 49, what is the value of x? —
7, -7
36.
If x = 3, what is the value of x^3 - 3x^2 + 3x - 1? —
8
37.
Find the product of the roots of x^2 + 8x + 15 = 0. —
15
38.
What is the discriminant of the quadratic equation ax^2 + bx + c = 0? —
b^2 - 4ac
39.
What is the sum of the roots of the quadratic equation ax^2 + bx + c = 0? —
-b/a
40.
For the quadratic equation 2x^2 - 7x + 3 = 0, find the nature of the roots. —
Real and distinct
41.
What is the nature of the roots of the quadratic equation x^2 + x + 1 = 0? —
Complex conjugates
42.
Solve the quadratic equation: x^2 - 5x + 6 = 0 —
x = 2, x = 3
43.
Solve for x: 3x^2 - 10x + 7 = 0 —
x = 1, x = 7/3
44.
Solve for x: 2x^2 + 5x - 3 = 0 —
x = 1/2, x = -3
45.
What are the roots of the quadratic equation 3x^2 + 5x - 2 = 0? —
x = 1/3, x = -2
46.
Find the roots of the quadratic equation x^2 + 4x + 4 = 0. —
x = -2
47.
Solve the equation: (x - 2)(x + 3) = 0 —
x = 2, x = -3
48.
Find the roots of the quadratic equation x^2 - 7x + 10 = 0. —
x = 2, x = 5
49.
Solve for x: x^2 - 6x + 9 = 0 —
x = 3
50.
If a quadratic equation has roots 3 and -5, what is the equation? —
x^2 + 2x - 15 = 0