Quadratic Equations [2 Marks]
1. Solve: x2 – 6x +8 = 0.
2. Solve: a2 – 5a – 20 = 4.
3. Solve:
![\[ \frac{y-4}{4} +\frac{6}{y+1} = \frac{1}{2} \]](https://swoadhyan.com/wp-content/ql-cache/quicklatex.com-4cf07bce38dc92404d2ce57f7369c386_l3.png "Rendered by QuickLaTeX.com")
4. Solve:
![\[ \frac{x^{2}}{25} -4 = 0 \]](https://swoadhyan.com/wp-content/ql-cache/quicklatex.com-fd0a6e8c5dea1007c5a3f3d02178aa95_l3.png "Rendered by QuickLaTeX.com")
5. Solve: (x + 7)2 – 49 = 0.
6. Solve: 14 – s – 3s2.
7. Find the quadratic equation having its roots as x = 7 and x = -3.
8. Find the quadratic equation having its roots as y = -1/5 and y = 1/3
9. Find the quadratic equation having its roots as t = 1/7 and t = -1.
Answers:
1. 4 and 2
2. 8 and -3
3. -18
4. 10 and -10
5. -14 and 0
6. -7/3 and 2
7. x2 -4x -21 = 0
8. 15y2 – 2y – 1 = 0
9. 7t2 + 6t – 1 = 0
