aliensbrain
  • Home
  • Study
  • Quizzes
  • 🎤AI Practicefree
  • Notebooks
  • Community
  • Sign in
Multiple choice

The roots of the quadratic equation (2x - 3)(x + 2) = 3x + 9 are

  1. 1 + 31 2 , 1 − 31 2

  2. -12 and − 7 2

  3. 3 2 and -2

  4. 1 and − 3 7

  5. 1 + 30 7 a n d 1 − 30 7

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Expanding and rearranging gives 2x^2 - 2x - 15 = 0. Applying the quadratic formula gives roots (1 + sqrt(31))/2 and (1 - sqrt(31))/2.

Keep practicing — related questions

  • The equation to the chord of the circle $x^{2}+y^{2}=9$ whose middle point is $(1,-2)$ is
  • If the roots of the equation $(x+a)(x+b)+(x+a)(x+c)+(x+b)(x+c)=0$ are equal, then
  • What will be the output of the program? class Bitwise { public static void main(String [] args) { int x = 1...
  • switch(x) { default: System.out.println(Hello); } Which two are acceptable types for x? 1. byte 2. long 3. ...
  • Which three are valid method signatures in an interface? 1. private int getArea(); 2. public float getVol(f...
  • Which of the following are legal lines of code? 1. int w = (int)888.8; 2. byte x = (byte)1000L; 3. long y =...
  • Name the stage of cell cycle at which the following events occurs. 1. Chromosomes are moved to spindle equa...
  • The ratio of three numbers is 2 : 5 : 3. If their HCF is 9, then find the LCM of these numbers.

Practice this chapter

  • Algebra (3715 questions)
Advertisement
© Aliensbrain | all rights reserved
  • About
  • Contact
  • Terms and Condition
  • Privacy Policy