Do you remember this problem from 3rd grade?

Algebra Level 1

Let R = ( x a ) ( x b ) ( x c ) ( x d ) . . . ( x z ) \displaystyle R = (x-a)(x-b)(x-c)(x-d)...(x-z) .

Find R.


The answer is 0.

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1 solution

R=(x-a)(x-b)...(x-x)(x-y)(x-z)

(x-x) = 0

so, R=0

really? that's lame... (but I guess I should have seen it anyway)

Jared Jones - 6 years, 4 months ago

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