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If a\ a n d\ b are respectively the sum ...

If `a\ a n d\ b` are respectively the sum and product of coefficients of terms in the expression `x^2+y^2+z^2-x y-y z-z x ,` then `a+2b=`
(a)0 (b) 2 (c)`-2` (d) `-1`

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RD SHARMA ENGLISH-ALGEBRAIC EXPRESSIONS-All Questions
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  2. Simplify each of the following algebraic expressions by removing gro...

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  6. Simplify each of the following algebraic expressions by removing gro...

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  7. Add the following : 2x^2y,-4x^2y,6x^2y,-5x^2y

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  8. Which of the following is not a monomial?

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  9. The sum of the coefficients in the monomials 3a^2b and -2a b^2 is

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  10. The coefficient of x^2 in -5/3\ x^2y is equal to :- (a)-5/3 (b) -5/...

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  11. If a ,\ b\ a n d\ c\ a r e\ respectively the coefficients of x^2 in...

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  12. The sum of the coefficients in the terms of 2x^2y-3x y^2+4x y is (...

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  13. The product of the coefficients of terms in -4/3a b^2+1/4b c^2+3c a^...

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  14. If a\ a n d\ b are respectively the sum and product of coefficients ...

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  15. If P=3x^3+3x^2+3x+3 and Q=3x^2-3x+3, then P-Q= (a)3x^3 (b) 3x^3+6x...

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  16. The sum of the values of the expression 2x^2-2x+2 when x=-1 and x=1 ...

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  17. What should be added to 3x^2+4 to get 9x^2-7? (a)6x^2-11\ (b) 6x^...

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  18. How much is a^2-3a greater than 2a^2+4a ? (A) a^2-7a (B) a^2+7...

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  19. How much is -2x^2+x+1 less than x^2+2x-3? (a) x^2+3x-2 (b) 3x^2+x-...

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  20. What should be added to x y+y z+z x to get x y-y z-z x ? (a)-2x y-...

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