The area of a square is 4x2 - 12x + 9. Which of the following will be the side of the square ?
Answer & explanation
Correct answer: option 2
We know that,
The area of the square = side2
We have,
4x2 - 12x + 9 =4x2 - 12x + 9
=4x2 - (6 + 6)x + 9
=4x2 - 6x - 6x + 9
=2x(2x - 3) - 3(2x -3)
=(2x - 3)(2x - 3)
=(2x - 3)2
The side of square = (2x-3)