The document RD Sharma Solutions Ex-3.1, Rationalisation, Class 9, Maths Class 9 Notes | EduRev is a part of the Class 9 Course RD Sharma Solutions for Class 9 Mathematics.

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**Q. 1. Simplify each of the following:**

**Sol:**

= 4^{1}

= 4

= 15

**Q. 2. Simplify the following expressions:**

**Solution:**

**Q. 3. Simplify the following expressions:**

**Solution:**

As we know, (a + b) (^{2}âˆ’b^{2})

So, 11^{2} â€“ 11

121 â€“11 = 110

As we know, (a + b) (a - b) = (a^{2}âˆ’b^{2})

So, 5^{2} â€“ 7

25 â€“ 7 = 18

As we know, (a + b) (a - b) = (a^{2}âˆ’b^{2})

= 6

As we know, (a + b) (a - b) = (a^{2}âˆ’b^{2})

= 6

As we know, (a + b) (a - b) = (a^{2}âˆ’b^{2})

= 5 â€“ 2

= 3

**Q. 4. Simplify the following expressions:**

**Solution:**

As we

As we know, (^{2} = (a^{2}âˆ’2Ã—aÃ—b+b^{2})

As we know, (a + b)^{2} = (a^{2}+2Ã—aÃ—b+b^{2})

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