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Finding the Value of an Expression

iii Find the ...

Question

Question 3 (iii)

Find the value of the following expression, when x = -1:
$x^{2} + 2 x + 1$

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Solution

$x^{2} + 2 x + 1 = (- 1)^{2} + 2 (- 1) + 1$ [Putting x = -1]
= 1 – 2 + 1 = 2 – 2 = 0

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Finding the Value of an Expression

Standard VII Mathematics

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