aliensbrain
  • Home
  • Study
  • Quizzes
  • 🎤AI Practicefree
  • Notebooks
  • Community
  • Sign in
  • Maths Online Test Class 8
  • The value of ( a + b)2+(a -b)2 is
Multiple choice

The value of ( a + b)2+(a -b)2 is

  1. 2a2b2

  2. 2a2 + b2

  3. 2( a2+b2)

  4. 4ab

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

Expand both squares: (a^2 + 2ab + b^2) + (a^2 - 2ab + b^2). The 2ab and -2ab cancel out, leaving 2a^2 + 2b^2, which is 2(a^2 + b^2).

Keep practicing — related questions

  • Which of the following is correct?
  • A2 – B2 is equal to
  • What is the value of 2 + (- 2) + 2 + (- 2) + 2?
  • Which of the following statements is/are true? A. The dihedral angle between the H-atoms in staggered confo...
  • Consider the following statements: 1. An idea about the climate of a place is obtained from mean monthly va...
  • Directions: For the word given above the table, match the dictionary definitions on the left (1, 2, 3, 4) w...
  • What will be the output of the program? boolean bool = true; if(bool = false) /* Line 2 */ { System.out.pri...
  • Which of the following statements about the hashcode() method are incorrect? 1. The value returned by hashc...
Play the full quiz 🎤 Practise this topic out loud
Advertisement
© Aliensbrain | all rights reserved
  • About
  • Contact
  • Terms and Condition
  • Privacy Policy