Question

Simplily:
Using (x + a)(x + b) = x2 + (a + b)x + ab, find the value of 102 x 104.​

Answer 1

= (100+2)(100+4)

= (100)²+(2+4)100+2*4

= 10000+600+8

= 10608

Answer 2

Answer:

103×104

=(100+3)(100+4)

using identity (x+a)(x+b)=x^2 +x(a+b) +ab,

( {100})^{2} + 100(3 + 4) + 3 \times 4(100)2+100(3+4)+3×4

= 10000 + 700 + 12=10000+700+12

=10712 is the answer