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find the following products (i) ((x...

find the following products
`(i) ((x)/(2)+2y)((x^(2))/(4)-xy+4y^(2))`(ii) `(x^(2)-1)(x^(4)+x^(2)+1)`

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(i) `(i) ((x)/(2)+2y)((x^(2))/(4)-xy+4y^(2))=(x)/(2)((x^(2))/(4)-xy+4y^(2))+2y((x^(2))/(4)-xy+4y^(2))`
`=(x)/(2)((x^(2))/(4))+(x)/(2)(-xy)+(x)/(2)(4y^(2))+2y((x^(2))/(4))+2y(-xy)+2y(4y^(2))`
`=(x^(2))/(8)-(x^(2)y)/(2)+2xy^(2)+(x^(2)y)/(2)+8y^(3)`
`=(x^(3))/(8)+8y^(3)`
(ii) `(x^(2)-1)(x^(4)x^(2)+1)=x^(2)(x^(4)+x^(2)+1)-1(x^(4)+x^(2)+1)`
` =[x^(2)(x^(4))+x^(2)(x^(2))+x^(2)(1)-1(x)^(4)-1(x^(2))-1(1)]`
`=x^(6)+x^(4)+x^(2)-x^(4)-x^(2)-1=x^(6)-1`
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NCERT EXEMPLAR-POLYNOMIALS-Polynomials
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  4. find the following products (i) ((x)/(2)+2y)((x^(2))/(4)-xy+4y^(2...

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  6. Find the product: (2x-y+3z)(4x^2+y^2+9z^2+2x y+3y z-6x z)

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  7. Factorise (i) a^(3)+8b^(3)+64c^(3)-24abc (ii) 2sqrt(2)a^(3)+8b^(3)-2...

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  8. without actually calculating , the cubes , find the valuse of ...

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  9. Factorize : (x-2y)^3+(2y-3z)^3+(3z-x)^3

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  10. Find the value of : (1) x^3 + y^3 -12xy + 64 when x+y+4=0 (2) x^3 ...

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  12. If the polynomials az^3+4z^2+3z-4 and z^3-4z+a leave the same remainde...

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  14. if both x-2 and x-(1)/(2) are factors of px^(2)+5x+r. then show ...

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  15. Without actual division, prove that 2x^4-5x^3+2x^2-x+2 is exactly divi...

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  16. Simplify :(2x-5y)^3-(2x+5y)^3

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  17. Multiply: x^2+4y^2+z^2+2x y+x z-2y z\ by x-2y-z

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  18. if a, and c are all non zero and a+b+c=0 , then find the value of...

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  19. If a+b+c=5 and ab+bc+ca=10, then find a^3+b^3+c^3-3abc

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  20. Prove that (a+b+c)^3 - a^3-b^3-c^3 = 3(a+b)(b+c)(c+a).

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