Which of the following is a quadratic equation

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2. Which of the following is a quadratic equation?

B. Linear Inequality C. Quadratic Equation D. Quadratic InequalityA 21² +41 - 1B. 3t - 7 = 23. In the quadratic equation 37 + 7x - 4 = 0, which is the quadratic term?C.S2 + 5s -4 = 0D. 2x? - 7 x > 3B. 7xC. 3x²D-44 Which of the following equation is NOT a quadratic equation?A 2x + 5x - 3 = 0 B. 3x (X-2) = 10 C. (2x + 5) (X-1) = -6 D. 2x+X+2=05 In a quadratic equation 3r + TX-4 = 0, what is the value of a?B 3xC. 7D-46 Reter the equation in no 5 which is the linear term?В 7хC. 3x2D. 47. Which of the following quadratic equation is wnitten in standard form?A 3X- 2x² = 7B - 2x² - 7=-3x C-2x2 - 7 + 3x = 0D. -2x2 + 3x - 7 = 08 Write (x+3)(x+4)= 0 in standard form of a quadratic equation.A 2 + 3x + 4B x² + 6x + 12C. x² + 7x + 12D. x2 + x + 129. Which of the following quadratic equation is in a form ax2 + c = 0?A. 2x + 3x = 0 B 2r = 3xC. 2x2 + 3 = 5D 2x2 + 3x + 010 Factor r + x = 0A 7.0B-70C 7.1D. -7, -111. Factor. n + 7 + 15 = 5A 5.2B-52C. 5 -2D.-5, -212. Which of the following equations may be solved easily by factoring?A. 2r² = 7²B. w ² - 64 = 0Ct2 + 12t + 36 = 0 D. 252 +85 - 10 = 013. The roots of a quadratic equation are -5 and 3. Which of the following quadratic equations has these roots?AX - 8x + 15 = 0 Br? - 2x - 15 = 0 C. x2 + 8x + 15 = 0 D. x2 + 2x - 15 = 014. How many real roots does a quadratic equation x2 +5x+7=0 have?A. OB.1C. 2D315. Which of the following values of x make the equation X2+7X-18=0 true?1-9Il 2III. 9A. I & liBli & liiC.I & liiD. 1, li, li16. The roots are -1 and -8. which of the following equations has these roots?A X + 9x = -8BXP + 7x = 0C. t + 8t + 16 = 0D. h2 + 6h = 1617 Extract (25 - 1) = 225A. 8.-7B.-8.7C. -8,-D. 8,713 Rey has an assignment, he needs to solve this equation by factoring: x2 + 9x = -8. What must he do? Arrangethe given below and choose the best answer.2. (+ 1) = 0; (x + 8) = 01. + 9x +8.4. x = -1; x = -8.3. (x + 1)(x + 8) = 0.B. 1-3-2-4A 1-2-3-4C. 1-2-4-3D. 4-3-2-1to make it a perfect square19. What must be the number that should be added to make the equation x2 + 2xtrinomial?B 4C.6A. 2D 820 Solve by completing the square: 2x + 8x - 10 = 0 What are the roots?B. -1.5C.1.-5A. 1,5D. -1,-5​

Answered by admin @


Answer:

The quadratic equation has degree

(a) 0

(b) 1

(c) 2

(d) 3

Answer/Explanation

Answer: c

Explaination:Reason: A quadratic equation has degree 2.

3. The cubic equation has degree

(a) 1

(b) 2

(c) 3

(d) 4

Answer/Explanation

Answer: c

Explaination:Reason: A cubic equation has degree 3.

4. A bi-quadratic equation has degree

(a) 1

(b) 2

(c) 3

(d) 4

Answer/Explanation

Answer: d

Explaination:Reason: A bi-quadratic equation has degree 4.

5. The polynomial equation x (x + 1) + 8 = (x + 2) {x – 2) is

(a) linear equation

(b) quadratic equation

(c) cubic equation

(d) bi-quadratic equation

Answer/Explanation

Answer: a

Explaination:Reason: We have x(x + 1) + 8 = (x + 2) (x – 2)

⇒ x² + x + 8 = x² – 4

⇒ x² + x + 8- x² + 4 = 0

⇒ x + 12 = 0, which is a linear equation.

6. The equation (x – 2)² + 1 = 2x – 3 is a

(a) linear equation

(b) quadratic equation

(c) cubic equation

(d) bi-quadratic equation

Answer/Explanation

Answer: b

Explaination:Reason: We have (x – 2)² + 1 = 2x – 3

⇒ x² + 4 – 2 × x × 2 + 1 = 2x – 3

⇒ x² – 4x + 5 – 2x + 3 = 0

∴ x² – 6x + 8 = 0, which is a quadratic equation.


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