The area of a square is 4x2 - 12x + 9. Which of the following will be the side of the square?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. (2x - 3).
According to the question,
= 4x2 - 12x + 9
= 4x2 - 6x - 6x + 9
= 2x(2x - 3) -3(2x - 3)
= (2x - 3)(2x - 3)
= (2x - 3)2
Area of the square = a2
So, the side of the square = (2x - 3)