Find the value of the expression x2-x-1 at x-1A- -1B- 1C- 3D- -3

The correct option is B 1At x = 1, x^2+x+1= ( 1)^2+( 1)+1 = 1 1 + 1 = 1 ...

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Factorisation by Common Factors

Find the valu...

Question

Find the value of the expression
$(x^{2} + x + 1) at x = - 1.$

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