1. Which of these is a quadratic equation? A. 2r? + 4r – 1 В. 3t — 7 %3D 2 C. s? + 5s – 4 = 0 D. 2x? – 7x 2 3 2. In the quadratic equation 3x? + 7x – 4 = 0, which is the quadratic term? А. Зх? В. 7x C. x? D. – 4 3. Find the a, b and c in the quadratic equation x? + 6x + 24 = 0. A. a = 2, b = 6, c = 24 В. а%3D1, b %3D 6, с 3D 24 C. a = 2, b = - 6, c = 24 D. a = 1, b = - 6, c = 24 4. Which of the quadratic equations can be solved easily by extracting square roots? В. х? — 81 %3D 0 A. x² + 10x + 25 = 0 C. 2x? + 4x = 0 D. x? – 2x = 0 5. The roots of a quadratic equation are 3 and - 4. Which of the quadratic equations has these roots? А. (х + 4) (x + 3) %3Dо В. В. (х + 4) (х- 3) 3D 0 C. (x – 4) ( x + 3 ) = 0 D. (x – 4 ) ( x – 3 ) = 0
1. Which of these is a quadratic equation? A. 2r? + 4r – 1 В. 3t — 7 %3D 2 C. s? + 5s – 4 = 0 D. 2x? – 7x 2 3 2. In the quadratic equation 3x? + 7x – 4 = 0, which is the quadratic term? А. Зх? В. 7x C. x? D. – 4 3. Find the a, b and c in the quadratic equation x? + 6x + 24 = 0. A. a = 2, b = 6, c = 24 В. а%3D1, b %3D 6, с 3D 24 C. a = 2, b = - 6, c = 24 D. a = 1, b = - 6, c = 24 4. Which of the quadratic equations can be solved easily by extracting square roots? В. х? — 81 %3D 0 A. x² + 10x + 25 = 0 C. 2x? + 4x = 0 D. x? – 2x = 0 5. The roots of a quadratic equation are 3 and - 4. Which of the quadratic equations has these roots? А. (х + 4) (x + 3) %3Dо В. В. (х + 4) (х- 3) 3D 0 C. (x – 4) ( x + 3 ) = 0 D. (x – 4 ) ( x – 3 ) = 0
Transcribed Image Text:1. Which of these is a quadratic equation?
A. 2r? + 4r – 1
D. 2x? – 7x 2 3
В. 3t — 7 %3D 2
C. s? + 5s – 4 = 0
2. In the quadratic equation 3x2 + 7x – 4 = 0, which is the quadratic term?
А. Зх?
В. 7х
C. x?
D. – 4
3. Find the a, b and c in the quadratic equation x? + 6x + 24 = 0.
A. a = 2, b = 6, c = 24
B. a = 1, b = 6, c = 24
C. a = 2, b = - 6, c = 24
D. a = 1, b = - 6, c = 24
4. Which of the quadratic equations can be solved easily by extracting square roots?
В. x? — 81 %3D 0
C. 2x? + 4x = 0
D. x² – 2x = 0
A. x? + 10x + 25 = 0
5. The roots of a quadratic equation are 3 and - 4. Which of the quadratic equations has these
roots?
A. (x + 4) (x + 3) = 0
В. В. (х + 4) (х— 3) %3D 0
C. (x – 4) ( x + 3 ) = 0
D. (x – 4 ) ( x- 3 ) = 0
Transcribed Image Text:6. Harry solves the equation 4x2+12x – 8= 0 as illustrated below:
4x? + 24х - 8 % 0
4x2 + 24x = 8
x2 + 6x = 2
= 2+
x2 + 6x +
(x +3 )2 = 11
V11
V(x+3 )2
(x + 3 ) = ±/11
x = - 3+ V11
%3D
What must be added to both sides of the equation to complete the process of completing the
square?
А. 6
В. 7
С. 8
D. 9
7. Solve the equation 2x? = 1– 2x using quadratic formula.
В.
2
-1tv5
C. -1+ v3
D. –1+ V5
2
8. What are the roots of the quadratic equation x? + x – 56 = 0?
B. 8 and – 7
A. 2 and – 1
C. - 8 and 7
D. 3 and – 2
9. Find the dimensions of the rectangle if its area is 24 cm².
Зx+2
A. I= 24 cm
w = 1 cm
В. 1%3D8 ст
w = 3 cm
C. I = 6 cm
w = 4 cm
D. I = 12 cm
w = 4 cm
2х- 1
10. How many real solutions does the equation x? + 6x + 9 = 0 have?
A. 2
В. 1
С. О
D. cannot be determined
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