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The area of a square is 4x2 - 12x + 9. Which of the following will be the side of the square ? |
(2x + 3) (2x - 3) (3x -2) (3x + 2) |
(2x - 3) |
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) |
