Class 10 Exam  >  Class 10 Questions  >  Show that 5 - 3√2 is irrational. Related: Ex... Start Learning for Free
Show that 5 - 3√2 is irrational.
Most Upvoted Answer
Show that 5 - 3√2 is irrational. Related: Ex 1.3 NCERT Solutions, Rea...
Community Answer
Show that 5 - 3√2 is irrational. Related: Ex 1.3 NCERT Solutions, Rea...
Proof that 5 - 3√2 is irrational:


Assumption: Let's assume that 5 - 3√2 is rational.

Definition: A rational number is a number that can be expressed in the form p/q, where p and q are integers and q is not equal to 0.

Representation: So, we can represent 5 - 3√2 as p/q, where p and q are integers and q is not equal to 0.

Algebraic Manipulation: Multiplying the numerator and denominator by the conjugate of 5 - 3√2, which is 5 + 3√2, we get:

(5 - 3√2) * (5 + 3√2) / (5 + 3√2)
= (25 - 9*2) / (5 + 3√2)
= (7) / (5 + 3√2)

Contradiction: Now we have a contradiction, as we have expressed 5 - 3√2 as a rational number (7 / (5 + 3√2)), which violates our assumption. Hence, our assumption is wrong.

Conclusion: Therefore, 5 - 3√2 is irrational.
Attention Class 10 Students!
To make sure you are not studying endlessly, EduRev has designed Class 10 study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Class 10.
Explore Courses for Class 10 exam

Top Courses for Class 10

Show that 5 - 3√2 is irrational. Related: Ex 1.3 NCERT Solutions, Real Numbers - Mathematics for Class 10th
Question Description
Show that 5 - 3√2 is irrational. Related: Ex 1.3 NCERT Solutions, Real Numbers - Mathematics for Class 10th for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Show that 5 - 3√2 is irrational. Related: Ex 1.3 NCERT Solutions, Real Numbers - Mathematics for Class 10th covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Show that 5 - 3√2 is irrational. Related: Ex 1.3 NCERT Solutions, Real Numbers - Mathematics for Class 10th.
Solutions for Show that 5 - 3√2 is irrational. Related: Ex 1.3 NCERT Solutions, Real Numbers - Mathematics for Class 10th in English & in Hindi are available as part of our courses for Class 10. Download more important topics, notes, lectures and mock test series for Class 10 Exam by signing up for free.
Here you can find the meaning of Show that 5 - 3√2 is irrational. Related: Ex 1.3 NCERT Solutions, Real Numbers - Mathematics for Class 10th defined & explained in the simplest way possible. Besides giving the explanation of Show that 5 - 3√2 is irrational. Related: Ex 1.3 NCERT Solutions, Real Numbers - Mathematics for Class 10th, a detailed solution for Show that 5 - 3√2 is irrational. Related: Ex 1.3 NCERT Solutions, Real Numbers - Mathematics for Class 10th has been provided alongside types of Show that 5 - 3√2 is irrational. Related: Ex 1.3 NCERT Solutions, Real Numbers - Mathematics for Class 10th theory, EduRev gives you an ample number of questions to practice Show that 5 - 3√2 is irrational. Related: Ex 1.3 NCERT Solutions, Real Numbers - Mathematics for Class 10th tests, examples and also practice Class 10 tests.
Explore Courses for Class 10 exam

Top Courses for Class 10

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev