Question

Using (x +a ) (x +b) = x2 + (a+b) x +ab,
find 103 x 104.​

Answer 1

103* 104=

(100+3)*(100+4)=

(100)^2 + (4+3)100+ 4*3=

10000+700+12= 10712

Therefore, the answer is 10712

Answer 2

x = 100

a = 3

b = 4

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

(100+3) (100+4)

= 100^2 + (3+4)*100 + 3*4

= 10000 + (7)*100 + 12

= 10000 + 700 + 12

= 10712

Hope it helps

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