다항식 연산과 인수분해 퀴즈 (해설 포함)

Question 1

다음을 간단히 하시오: $$(2x - 3)(x + 5).$$

Accepted Answer

$2x^2 + 7x - 15$

Answer

$2x^2 + 10x - 15$

Answer

$2x^2 + 7x + 15$

Answer

$2x^2 + 2x - 15$

Question 2

완전히 인수분해하시오: $$8x^3 - 27.$$

Accepted Answer

$(2x-3)(4x^2+6x+9)$

Answer

$(2x+3)(4x^2-6x+9)$

Answer

$(8x-27)(x^2+3)$

Answer

$(2x-3)(4x^2-6x+9)$

Question 3

묶어서 완전히 인수분해하시오: $$2x^3 - 6x^2 + 3x - 9.$$

Accepted Answer

$(x-3)(2x^2+3)$

Answer

$(x-3)(2x^2-3)$

Answer

$(x+3)(2x^2-3)$

Answer

$(2x^2)(x-3)$

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