Question

Evaluate the following by using suitable identity a)202x205
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Answer 1

Answer:

202*205

(200+2)(200+5) ---- ( x+a) ( x+b) = x²+(a+b)x+ab

(200)²+(2+5)200+2*5

40000+400+1000+10

40400+1010

41410

Hope it helps you....

Answer 2

Step-by-step explanation:

(200+2)(200+5)

=(x+a)(X+b)=x^2+(a+b)x+ab

=>X=200

=>b=5

=>a=2

so now,

Substitute in Identity

so,

(200+2)(200+5)=200^2+(2+5)200+2(5)

=40000+(7)200+10

=40000+1400+10

=41410

hey mate is this ur correct answer