Question

using the identity[ x+a][x+b] = x2 +[ a+B ]x +ab find 103x104

Answer 1

Step-by-step explanation:

Using identity:(x+a)(x+b)=2x+(a+b)x + ab

103=100+3

104=100+4

therefore,

(100+3)(100+4)

=2×100 + (3+4)100 + 3×4

=200 + 7×100 + 12

=200 + 700 + 12

=912

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