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Evaluate 107 x 93 WITHOUT MULTIPLYING DIRECTLY.

 (100+7)(100-7)= {(a+b)(a-b)= a*a-b*b}

100*100- 7*7

10000-49

9951

  • 4
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100+7(100-7)

by (a+b)(a-b)=a2-b2, we get

(100)2-(7)2

=10000-49

=9951

  • 0

(100+7)(100-7)

(a+b)(a-b)= a2 - b2

a= 100

b= 7

= (100)2- 72

= 10000- 49

= 9951

  • 0
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