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What should be added to 1+2x-3x^2 to get...

What should be added to `1+2x-3x^2` to get `x^2-x-1`?

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The correct Answer is:
`42x^(2)-3x-z`
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NCERT TELUGU-ALGEBRAIC EXPRESSIONS -Exercise -4
  1. Add the algebraic expressions using both horizontal and vertical metho...

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  2. Add the algebraic expressions using both horizontal and vertical metho...

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  3. Add the algebraic expressions using both horizontal and vertical metho...

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  4. Add the algebraic expressions using both horizontal and vertical metho...

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  5. Simplify:2x^2+5x-1+8x+x^2+7-6x+3-3x^2

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  6. Find the perimeter of the following rectangle ?

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  7. Find the perimeter of a triangle whose sides are 2a+3b, b-a, 4a-2b

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  8. Subtract the second expression from the first expression: 2a+b, a-b

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  9. Subtract the second expression from the first expression: x+2y+z, -x-y...

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  10. Subtract the second expression from the first expression: 3a^2-8ab-2b^...

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  11. Subtract the second expression from the first expression: 4pq-6p^2-2q^...

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  12. Subtract the second expression from the first expression: 7-2x-3x^2, 2...

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  13. Subtract the second expression from the first expression: 5x^2-3xy-7y^...

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  14. Subtract the second expression from the first expression: 6m^3+4m^2+7m...

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  15. Subtract the sum of x^2-5xy+2y^2 and y^2-2xy-3x^2 from the sum of 6x^2...

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  16. What should be added to 1+2x-3x^2 to get x^2-x-1?

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  17. What should be taken away from 3x^2-4y^2+5xy+20 to get x^2-y^2+6xy+20

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  18. The sum of 3 expressions is 8+13a+7a^2. Two of them are 2a^2+3a+2 and ...

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  19. If A=4x^(2)+y^(2)-6xy, B=3y^(2)+12x^(2)+8xy, C=6x^(2)+8y^(2)+6xy ...

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