Question

(3x²+5x-7) (x-1)-(x²-2x+3)(x+4)

Answer 1

A dealer bought 18 chairs at 550 per chair. He sold 12 of them at 650 per chair and the remaining chairs at 500 per chair find his profit or loss percent

Answer 2

The correct answer is "2x³-7x-5".

Step-by-step explanation:

$The \ given \ expression \ is:\\\\(3x^2+5x-7)(x-1)-(x^2-2x+3)(x+4)\\\\On \ applying \ multiplication,we \ get\\\\=x(3x^2+5x-7)-1(3x^2+5x-7)-[x(x^2-2x+3)+4(x^2-2x+3)]\\\\=3x^3+5x^2-7x-3x^2-5x+7-[x^3-2x^2+3x+4x^2-8x+12]\\\\=3x^3+5x^2-7x-3x^2-5x+7-x^3+2x^2-3x-4x^2+8x-12\\\\=2x^3-7x-5$

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