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By using an appropriate identity , expan...

By using an appropriate identity , expand the following :
`(x + 2y) ( x - 2y) `

Text Solution

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The correct Answer is:
`x^(2) - 4y^(2)`
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PEARSON IIT JEE FOUNDATION-EXPRESSIONS AND SPECIAL PRODUCTS -TEST YOUR CONCEPTS (SHORT ANSWER TYPE QUESTIONS)
  1. By using an appropriate identity , expand the following : ( x - 2y)...

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  2. By using an appropriate identity, expand the following: (x/2 - 2/(x)...

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  3. By using an appropriate identity , expand the following : (x + 2y) ...

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  4. By using an appropriate identity , expand the following : (x + y) (...

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  5. By using an appropriate identity , find the following : (102)^(2)

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  6. By using an appropriate identity , find the following : (54)^(2)

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  7. By using an appropriate identity , find the following : (10(1)/(4))^...

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  8. By using an appropriate identity , find the following : (95)^(2)

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  9. By using an appropriate identity , find the following : (28)^(2)

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  10. By using an appropriate identity , find the following : (9(1)/(2))^(...

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  11. By using an appropriate identity , find the following : 89 xx 111

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  12. By using an appropriate identity, find the following: 37 xx 43

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  13. Find the HCF of the following : 26x^(2)y^(2)z^(2) and 39x^(3)y^(2)z

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  14. Find the HCF of the following : 50 ab and 60 bc

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  15. Factorise the following : x^(2)(x + y) + y^(2) (x + y)

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  16. Factorise the following : (3x + 2y) (a -b) + (3x - 2y) ( a -b)

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  17. Find the value of 994 xx 1006 by using an appropriate identity .

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  18. Check whether the following are perfect squares or not : (a) 64x^(2)...

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  19. Check whether the following are perfect squares or not : (a) 64x^(2)...

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  20. Divide x^(2) + 6x + 8 by x + 2 and find the quotient .

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