Learn All Concepts of Chapter 1 Class 9 - FREE. Check - Chapter 1 Class 9 Maths
We do not leave an irrational number in the denominator.
So, we rationalise the denominator. Let us look at some examples
Last updated at Sept. 11, 2020 by Teachoo
Learn All Concepts of Chapter 1 Class 9 - FREE. Check - Chapter 1 Class 9 Maths
We do not leave an irrational number in the denominator.
So, we rationalise the denominator. Let us look at some examples
Transcript
Some Identities (โ๐)^2=๐ โ(๐^2 )=๐ โ๐๐=โ๐ รโ๐ โ(๐/๐)=โ๐/โ๐ (โ๐โโ๐)(โ๐+โ๐)=๐โ๐ (๐โโ๐)(๐+โ๐)=๐^2โ๐ (โ๐+โ๐)^2=๐+๐+2โ๐๐ (โ๐+โ๐)(โ๐+โ๐)=โ๐๐+โ๐๐ + โ๐๐ + โ๐๐
Rationalising
Add (3โ2+7โ3) and (โ2โ5โ3)
Divide 5โ11 by 3โ33
Multiply 2โ15 by 7โ5
Simplify (โ5+โ7)^2
Simplify (โ4โโ13)(โ4+โ13)
Simplify (9โโ3)(9+โ3)
Simplify (3โ5โ5โ2)(4โ5+3โ2)
Rationalise the denominator of 8/โ7
Rationalise the denominator of 1/((8 + 5โ2))
Multiple Choice Questions - Chapter 1 Class 9 Maths
Simplify (7โ3)/(โ10 + โ3)โ(2โ5)/(โ6 + โ5)โ(3โ2)/(โ15 + 3โ2)
If a and b are rational numbers and (โ11 โ โ7)/(โ11 + โ7) = a โ bโ77, find the value of a and b
Example 17
Example 18
Find the values of a and b if (7 + 3โ5)/(3 + โ5) โ (7 โ 3โ5)/(3 โ โ5) = a+โ5 b
Ex 1.5,5 Important
If x = 1/(2 โ โ3), find the value of x^3 โ 2x^2 โ 7x + 5
Example 19 Important
If a = 5 + 2โ6 and b = 1/a, then what will be the value of a^2+b^2 ?
Example 20
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