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9학년 인수분해 정리(4/19)

Authored by S Chung

Mathematics

9th Grade

CCSS covered

Used 1+ times

9학년 인수분해 정리(4/19)
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13 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

다음 중 옳지 않은 것은?

  a2−2a+1=(a+1)2a^2-2a+1=\left(a+1\right)^2  

  x2−8x+16=(x−4)2x^2-8x+16=\left(x-4\right)^2  

  a2−10a+25=(a−5)2a^2-10a+25=\left(a-5\right)^2  

  x2−18x+81=(x−9)2x^2-18x+81=\left(x-9\right)^2  

Tags

CCSS.HSA.APR.C.4

2.

MULTIPLE SELECT QUESTION

3 mins • 1 pt

4x2+axy+9y24x^2+axy+9y^2  이 완전제곱식일 때, aa  의 값이 될 수 있는 것을 모두 고르면?

 -6

 6

 -12

 12

Tags

CCSS.HSA.APR.C.4

3.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

x2+14x+ax^2+14x+a  와 9x2−bx+49x^2-bx+4  가 완전제곱식이 되도록 하는 양수 a, ba,\ b 에 대하여 a−ba-b  의 값은?

1212  

3737  

4949  

6161  

Tags

CCSS.HSA.APR.C.4

4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

 다음 중 옳지 않은 것은?

  a2−16=(a+4)(a−4)a^2-16=\left(a+4\right)\left(a-4\right)  

  64x2−49=(8x+7)(8x−7)64x^2-49=\left(8x+7\right)\left(8x-7\right)  

  36a2−b2 = (6a+b)(6a−b)36a^2-b^2\ =\ \left(6a+b\right)\left(6a-b\right)  

  742−262=470074^2-26^2=4700  

Tags

CCSS.HSA.APR.C.4

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

다음 중 옳지 않은 것은?

x2+8x+7 = (x+1)(x+7)x^2+8x+7\ =\ \left(x+1\right)\left(x+7\right)  

x2−2x−15=(x+3)(x−5)x^2-2x-15=\left(x+3\right)\left(x-5\right)  

x2+x−12=(x+4)(x−3)x^2+x-12=\left(x+4\right)\left(x-3\right)  

x2−13x+42=(x−14)(x−3)x^2-13x+42=\left(x-14\right)\left(x-3\right)  

6.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

다음 중 옳지 않은 것은?

3x2−7x+2=(3x−1)(x−2)3x^2-7x+2=\left(3x-1\right)\left(x-2\right)  

4a2−9a−9=(a+3)(4a−3)4a^2-9a-9=\left(a+3\right)\left(4a-3\right)  

5a2−6ab−8b2=(5a+4b)(a−2b)5a^2-6ab-8b^2=\left(5a+4b\right)\left(a-2b\right)  

6x2+xy−15y2=(3x+5y)(2x−3y)6x^2+xy-15y^2=\left(3x+5y\right)\left(2x-3y\right)  

7.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

x(x−1)(x+5)x\left(x-1\right)\left(x+5\right)  의 인수가 아닌 것은?

xx  

x(x−1)x\left(x-1\right)  

  x2+5xx^2+5x  

(x+5)2\left(x+5\right)^2  

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