4. Which of the following quadratic equations can be solved by extracting the square root?
a. x2 + 7x + 12 = 0
c. t2- 49 = 0
b. 2w2+ 7W + 3 = 0
d. 3r2+ 2r = 0
5. Find the roots of the equation x2-16 = 0
a. 2w? + 7w + 3 = 0
C. X = -4
b. x = +4
d. x = 0
6. Which of the following quadratic equations has no real roots?
a. x2 - 1 = 0
b. X2 + 1 = 0
C. X2 = 1
d. xl-4 = 0
7. The following equations can be solved by Extracting the square root EXCEPT,
a. x2 = 81
c. 3x2 - 12 = 0
b. x2 - 144 = 0
d. 5x2 + 25=0
8. Write the equation 2b2 - 98 = 0 in the form of x2 = k.
a. 2b2 = 0
b. 2b2 = 98
C, 2b2 = -98
d. 2b = 98
9. How many solutions do the equation x2 - 121 = 0 have? no root b. 1 d. 38
10. How many solutions do ( x − 4 )2 - 9 = 0 have?
a. no root
b. 1 d. 3 11. If k < 0, then x2 = k has a.
c. 2 C. 2

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