Question

Using suitable identity evaluate the following: 188 x 212​

Answer 1

we can solve this by using this identity: (a+b)(a-b) = a²-b²

=(200-12)(200+12)

=(200)²-(12)²

=40000-144

=39856

Answer 2

188 × 212 = 39856

Given :

The expression 188 × 212

To find :

The value using suitable identity

Formula :

a² - b² = ( a + b ) ( a - b )

Solution :

Step 1 of 2 :

Write down the given expression

The given expression is 188 × 212

Step 2 of 2 :

Find the value of the expression

188 × 212

= ( 200 - 12 ) × ( 200 + 12 )

= ( 200 + 12 ) × ( 200 - 12 )

= 200² - 12²

= 40000 - 144

= 39856

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