Question

what is the value of 248 square - 249 square

Answer 1

a^2 - b^² = (a+b) (a-b)
248^2 - 249^2 = (248+249) (248-249)
= (497) (-1)
= -497

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Answer 2

248² - 249² = - 497

Given :

The expression 248² - 249²

To find :

The value of the expression

Solution :

Step 1 of 2 :

Write down the given expression

The given expression is

248² - 249²

Step 2 of 2 :

Find the value of the expression

Use the formula a² - b² = ( a + b ) ( a - b )

$\sf {248}^{2} - {249}^{2}$

$\sf = (248 + 249) \times (248 - 249)$

$\sf =497 \times (-1)$

$\sf = - 497$

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