Algebra

About Me Shubham Agrawal IIT Roorkee 2013 graduate IIM Dropout SBI PO under 100 ranker (dropout) Left job to pursue my passion- Education

Linear Equation with 1 variable

Concept . Have only 1 variable, generally denoted by x The general form of such equations is ax + b- c, where a, b and c are constants and a +0

Applications Q. The denominator of a rational number is greater than its numerator by 4. If 4 is subtracted from the numerator and 2 is added to its denominator, the new number becomes 1/6. Find the original number.

Applications Q. The denominator of a rational number is greater than its numerator by 4. If 4 is subtracted from the numerator and 2 is added to its denominator, the new number becomes 1/6. Find the original umber. 6

Applications Q. 5/7 of 4/15 of a number is 8 more than 2/5 of 4/9 of the same number. What is half of that number?

Applications Q. 5/7 of 4/15 of a number is 8 more than 2/5 of 4/9 of the same number. What is half of that number? 2 l i S

Linear Equation with 2 variables

Concept Usually of the form ax + by +c o Represents a line in x y plane For every value of x, there's a corresponding value of

Concept If there are 2 equations of the form 1st Method 2 2. 25 , b CA 2 2. 2.

Question -2

Concept If there are 2 equations of the form 2nd Method Subtract or add one equation with the other to eliminate either x or y

Concept Needs 2 equations to find the unique value of the 2 variables If i then infinitely many solution (as it's a2 b2 C2 the same equation)

Applications /2 2

Applications Q. The ratio of the ages of the father and the son at present is 3: 1. Four years earliar, the ratio was 4: 1. What are the present ages of the son and the father? 2 Methods:

Applications Q. The ratio of the ages of the father and the son at present is 3: 1. Four years earliar, the ratio was 4: 1 What are the present ages of the son and the father? 3 12_

Concept . Degree (or power) of one variable is 2 General form: ax2 + bx +c0 where a, b and c are all real numbers and a 0. Example: 2x2 - 5x + 3 0

Question Q. Solve 2x2 +6-7x

Question Q. Solve 2x2 + 6 7x 2 1 -3 2 3 2

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Shubham Agrawal

IIT Roorkee Grad.
IIM L |Dropout.
SBI PO 2017 Topper and Dropout.
Full Time Educator.

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Sirajuddin uddin

10 months ago

very good explanation

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