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POST-test Math

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Republic of the Philippines

Department of Education
REGION X- NORTHERN MINDANAO
SCHOOLS DIVISION OF MISAMIS ORIENTAL
LAGUINDINGAN NATIONAL HIGH SCHOOL

MATHEMATICS 8
POSTTEST

Name: _________________________________ Score: ___________


Direction: Encircle the correct answer to the following questions.
__ 1. What is the Greatest Common Factor of 24 and 45?
A. 1 B. 2 C. 3 D. 6
___ 2. What is the process of finding the factors of an expression which is the reverse process of
multiplication?
A. factoring B. rationalization C. special product D. continuous division
___ 3. What are the complete factors of the polynomial 7 x − 14?
A. 7(x− 1) B. 7(1 − x) C. 7x– 1 D. 7(x− 2)
___ 4. Which of the following pair of numbers has a GCF of 8?
A. 2 and 3 B. 8 and 12 C. 16 and 40 D. 12 and 18
___ 5. All of the following are factors of 12x2 EXCEPT one. What is it?
A. 6 B. 12 C. x3 D. 12x2
___ 6. If one factor of 4x3 + 6x is 2x, what is the other factor?
A. 2x + 3 B. 4x + 6 C. 2x + 6 D. 2x2 + 3
___ 7. Which are the complete factors of 2x – 12x ?
8 6

A. 2x5(x2- 6) B. 2x5(x2 – 6x) C. 2x4(x2 − 6) D. x6 (2x2– 12x)


___ 8. Which of the following is a perfect square expression?
A. 81x2 B. 64 C. 9x5 D. 16x7
___ 9. Which of the following is NOT a difference of two squares?
A. 9a2 – 81 B. c4 − 18 C. d4 – 25f2 D. 121e2 – 49
___ 10. Which of the following expressions has factors of (4x - 5y) and (4x + 5y)?
A. 16x2 - 25 y2 B. 16x2 + 25y2 C. 4x2 + 5y2 D. 4x2 – 5y2
___ 11. Which of the following expressions is a perfect cube?
A. 8 B. 27x6 C. 64x4 D. 125x5
___ 12. Using the pattern for factoring the sum of cubes, we know that factoring a3 + b3 gives.
A. (a − x) (a2 – 2x+ b2) B. (a +x) (a2 + 2x+ b2) C. (a− x)(a2 + 2x+b2 ) D. (a + x)(a2 - 2x+ b2)
___ 13. What is the complete factored form of 27x3 – 64y3?
A. (3x – 4y) (9x2 - 12xy + 16y2) C. (3x – 4y) (9x2 + 12xy + 16y2)
2 2
B. (3x + 4y) (9x + 12xy + 16y ) D. (3x + 4y)(9x2 - 12xy + 16y2)
___ 14. What is the result when you square a binomial?
A. binomial B. difference of two squares C. sum of two squares D. perfect square trinomial
___ 15. All of the following are perfect square trinomials EXCEPT one. Which is it?
A. 4x2 + 12x + 9y2 B. x2 +4xy + 16y2 C. 9a2 − 36x+ 36 D. a2 – 4ab + 4b2
___ 16. Which of the following is equal to 4x − 12xy + 9y ?
2 2

A. (x − 3y)2 B. (x + 3y)2 C. (2x − 3y)2 D. (2x + 3y)2


___ 17. What are the two numbers whose sum is -7 and whose product is 12?
A. 3 and -4 B. -3 and 4 C. -3 and -4 D. 3 and 4
___ 18. What are the two expressions whose sum is 3x and whose product is -10x2?
A. 2x and 5x B. -2x and 5x C. 2x and -5x D. -2x and – 5x
___ 19. Find the missing term: (x + ___) (3x + ___) = 3x2 + 27x + 24
A. (8, 3) B. (3, 8) C. (4, 6) D. (6, 4)
2
___ 20. Which of the following are the factors of x + 5x + 6?
A. (x + 1) (x + 6) B. (x + 3) (x + 2) C. (x – 1) (x + 6) D. (x + 1) (x + 5)
___ 21. If one factor of 2x2 − 2x − 24 is x + 3, what is the other factor?
A. x – 3 B. x + 8 C. x – 8 D. 2x – 8
___ 22. What is the complete factored form of x2 + 9x - 10?
A. (x + 2) (x + 5) B. (x + 1) (x + 10) C. (x − 2) (x + 5) D. (x − 1) (x + 10)
2 2
___ 23. Anne squared 3x + 4y as 9x + 16y , which of the following statement is TRUE?
A. The answer is correct because to square a binomial, distribute the exponent B. The answer is wrong
because the product of squaring a binomial is a trinomial. C. The answer is correct because the product of
squaring a binomial is another binomial D. The answer is wrong because to square a binomial is to
multiply the expression by 2.
___ 24. What is the area of a square garden whose sides measure (5x + 2) meters?
A. (25x2 + 20x + 4) meter squares C. (25x2 + 10x + 4) meter squares
B. (25x – 20x + 4) meter squares
2
D. (25x2 – 10x + 4) meter squares
2
___ 25. The area of a square is 9x + 12x+ 4 square units. Which expression represents the length of the side?
A. (3x+ 2) units B. (4x+ 9) units C. (2x+ 3) units D. (4x+ 3) units

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