Question

evaluate 101×98 using suitable identity​

Answer 1

Answer:

Step-by-step explanation:

101*98

=(100+1)(100-2)

(x+a)(x+b)=x²+(a+b)x+ab

=100²+(1-2)100+(-2*1)

=10000-100-2

=9900-2

=9898

Answer 2

Answer:

answer is 9898

Step-by-step explanation:

101 x 98

( x + a ) ( x + b ) = x² + ( a + b ) x + ab

x= 100 , a= 1 ,b= -2

(100)²+ [ 1 + ( - 2 ) ] × 100 + 1  ( - 2 )

10000-100-2

9900-2

9898

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