volume_mute

Expand and simplify

publish date: 2020/11/26 02:04:00 GMT+11

volume_mute

(2x − 5)2

a-  4x2 − 20x + 25

b- 4x2 − 20x + 5

c- x2 − 20x + 25

d- 4x2 − 5x + 25 

a
b
c
d

Correct Answer

a

Explanation

  1. Write the expression.
    • (2x − 5)2
  2. Expand using the rule
    • (a − b)2 = a2 − 2ab + b2.
    • = (2x)2 − 2 × 2x × 5 + (5)2
      = 4x2 − 20x + 25

Reference

Maths_Quest_10+10A_VC_Revised_Edition_Book

Quizzes you can take where this question appears