(D) Using the algebraic identity $a^{2}-b^{2}=(a+b)(a-b)$,where $a=249$ and $b=248$:$(249)^{2}-(248)^{2}=(249+248)(249-248)$$= (497)(1)$$= 497$Hence,$

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(D) Using the algebraic identity $a^{2}-b^{2}=(a+b)(a-b)$,where $a=249$ and $b=248$:$(249)^{2}-(248)^{2}=(249+248)(249-248)$$= (497)(1)$$= 497$Hence,$(d)$ is the correct answer.

Class 9 Mathematics Polynomials Mix Examples - Polynomials

Easy

The value of $249^{2}-248^{2}$ is

A
$1^{2}$
B
$477$
C
$487$
D
$497$

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Mix Examples - Polynomials

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The value of $249^{2}-248^{2}$ is

Similar Questions

Find the value of the polynomial $3x^{3}-4x^{2}+7x-5$ when $x=3$.

Factorise $9 x^{2}-21 x y+10 y^{2}$.

Check whether the polynomial $p(x) = x^{3} + 9x^{2} + 26x + 24$ is a multiple of $x + 2$ or not.

Factorise the expression: $\frac{4x^2}{9} - \frac{1}{25}$

If $a+b+c=9$ and $ab+bc+ca=26$,find $a^{2}+b^{2}+c^{2}$.

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