**Blog-73**

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Dear Students,

Download following files for learning Formulas more effectively. Take the print out of these files and write your answers daily to improve your scores in 10th standard/grade.

[ Note: The following 2 files are available in the secured drive. While downloading, your email might be asked. Please provide it to download the files. I assure that your email-id will not be given to anybody ]

Following two files are very important to improve your base for remembering the formulas. It is 100 % free for all the students of the world. Download these two files, take the Print Out of these files on two sides of the paper and practice these formulas for your benefit to get high scores in Mathematics Standard 10/ Grade 10.

Please send the request for downloading the following files which will really help you to improve your mathematical skills for Standard 10 / Grade 10. This is the PRACTICE SHEET of Formulas.

1) Click HERE to Read the Blog-69 (01 Basics of Quadratic Equations (Grades 9 to 12) Part-01)

Some special and critical types of the factors:

Please download the following file and study it very carefully so that you will not find any difficulties while solving quadratic equations.

Click HERE to download the file " Critical-type-of-factors.pdf "

Just go through this downloaded file and be prepared to solve any problem pertaining to these critical factors.

c] Solve the quadratic equation a x

Click HERE to download the file " Critical-type-of-factors.pdf "

Just go through this downloaded file and be prepared to solve any problem pertaining to these critical factors.

c] Solve the quadratic equation a x

^{2}+ b x + c = 0 using perfect square method.
Now we will see few quadratic equation using formula method.

a) Solve the quadratic equation x

^{2}- 4 x - 21 = 0.
Solution:

1) Comparing x

^{2}- 4 x - 21 = 0 with a x^{2}+ b x + c = 0 we get,
a = 1, b = - 4, c = - 21

= (- 4 )

^{2}- 4 (1) ( - 21)
= 16 + 84

= 100