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Find the value of the following expressi...

Find the value of the following expressions, when x = –1:
2x – 7

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The correct Answer is:
`-9`
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NAND LAL PUBLICATION-ALGEBRAIC EXPRESSIONS -EXERCISE 12.3
  1. If p = – 2, find the value of – 3p^2 + 4p + 7

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  2. If p = – 2, find the value of – 2p^3 – 3p^2 + 4p + 7

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  3. Find the value of the following expressions, when x = –1: 2x – 7

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  4. Find the value of the following expressions, when x = –1: – x + 2

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  5. Find the value of the following expressions, when x = –1: x^2 + 2x + 1

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  6. Find the value of the following expressions, when x = –1: 2x^2 – x – 2

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  7. If a = 2, b = – 2, find the value of: a^2 + b^2

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  8. If a = 2, b = – 2, find the value of: a^2 + ab + b^2

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  9. If a=2,b=-2 find the value of a^(2)-b^(2)

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  10. When a = 0, b = – 1, find the value of the given expressions 2a + 2b

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  11. When a = 0, b = – 1, find the value of the given expressions 2a^2 + b^...

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  12. When a = 0, b = – 1, find the value of the given expressions 2a^2b + 2...

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  13. When a = 0, b = – 1, find the value of the given expressions a^2 + ab ...

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  14. Simplify the expressions and find the value if x is equal to 2 x + 7 +...

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  15. Simplify the expressions and find the value if x is equal to 2 3 (x +...

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  16. Simplify the expressions and find the value if x is equal to 2 6x + 5 ...

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  17. Simplify the expressions and find the value if x is equal to 2 4(2x – ...

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  18. Simplify these expressions and find their values if x = 3, a = – 1, b ...

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  19. Simplify these expressions and find their values if x = 3, a = – 1, b ...

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  20. Simplify these expressions and find their values if x = 3, a = – 1, b ...

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