Using suitable identity evaluate the following: 188 x 212
Answers
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
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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