Question

231 square -131 square evaluate using identity​

Answer 1

Answer:

231²-131² is of the form a²-b²=(a+b)(a-b)

so,231²-131²=(231+131)(231-131)

=(362)(100)

=36200

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Answer 2

231² - 131² = 36200

Given :

The expression 231² - 131²

To find :

The value of the expression using suitable identity

Identity Used :

a² - b² = (a + b) (a - b)

Solution :

Step 1 of 2 :

Write down the given expression

The given expression is

231² - 131²

Step 2 of 2 :

Find the value of the expression

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

$\sf {231}^{2} - {131}^{2}$

$\sf = (231 + 131) \times (231 - 131)$

$\sf = 362 \times 100$

$\sf = 36200$

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