12-05-2014
Mathematics

contestada

Which expression is equivalent to (x²+3x-4)(x-5)

1) x³+8x²-19x+20
2) x³-2x²-19x+20
3) x³-2x²-11x+20
4) x³-8x²-11x+20

Respuesta :

kate200468 kate200468

12-05-2014

[tex](x^2+3x-4)(x-5)=x^3-5x^2+3x^2-15x-4x+20=\\ \\=x^3-2x^2-19x+20\ \ \ \Rightarrow\ \ \ Ans.\ B[/tex]

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