1st Periodic Test - Math 8
1st Periodic Test - Math 8
1st Periodic Test - Math 8
____12. What is the greatest common factor in the expression 28x8y4z6 + 16x3y4z5?
a. 8x3y4z5 b. 4x3y4z5 c. 4x4y4z3 d. 8x4y4z3
_____19. Find the missing term so that 16x4 + _____+ 25 forms a perfect square trinomial.
a. 20x b. 20x2 c. 40x d. 40x2
_____21. What is the area of a rectangle whose length is (4x + 3) and whose width is (x – ½)?
a. 4x2 – x – 3/2 b. 4x2 + 2x +3/2 c. 4x2 + 5x – 2 d. 4x2 + x – 3/2
_____22. The area of a rectangular garden is (12x2 – 8x – 15)m2, what are its dimensions?
a. (3x – 5)m by (4x + 3)m c. (6x – 3)m by (2x – 5)m
b. (6x + 5)m by (2x – 3)m d. (12x – 15)m by (x + 1)m
____23. Liza factored the expression 15x2y3 + 10x4y + 5xy as 5xy(3xy2 + 2x3). Did Liza factor it correctly?
a. No, because 5xy is not the common factor.
b. Yes, because the last term is cancelled out.
c. Yes, there exists a common factor on all terms.
d. No, because the last term when factored is 1 and should not be omitted.
____24. Anne squared the expression 3x + 4y as 9x2 + 16y2, which of the following statement is correct with the answer of
your classmate?
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.