Find the product using suitable identity 197 × 207
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(200-3)(200+7)
by using (x+a)(x+b) = x^2 + (a+b) x + ab
(200)^2 + ( 7-3) * 200 + ( 7)(-3)
40000+4*200+(-21)
40000+800-21
40779
by using (x+a)(x+b) = x^2 + (a+b) x + ab
(200)^2 + ( 7-3) * 200 + ( 7)(-3)
40000+4*200+(-21)
40000+800-21
40779
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