Which of the following quadratic equations has equal roots?
1). x2- 14x-49= 0
2). x2 + 7x + 49 = 0
3). x2 -7x+49= 0
4). x2 + 14x + 49 = 0
1. What is the value of (4.6 + 3.1)2 - (4.6 - 3.1)2?
2. In a triangle,if three altitudes are equal, then the triangle is
4. What is the value equation a3 + b3 + c3 - 3abc if a2 + b2 + c2 = ab + bc + ca + 4 and a + b + c = 4.
6. If 2x + 2(4 + 3x) < 2 + 3x > 2x + $\frac{x}{2}$; then x can take which of the following values?
7. Given: 6x + 2(6 - x) > 2x - 2 < 5x/2 - 3x/4; then x can take which of the following values?
8. If x + y = 12 and xy = 32, then what is the value of x2 + y2
9. Coefficient of x in (x + 8)(6 - 3x) is
10. If \(3a - \frac{3}{a} - 4 = 0\), then find the value of \({a^3} - \frac{1}{{{a^3}}} + 4\).