4 x 3.52 = 4 x 12.25 = 49. (4 x 3.5)2 = 196. Take your pick.
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35 squared = 35 x 35 = 1225 56 squared = 56 x 56 = 3136
13 squared x 4 squared is equal to 2,704.
4 squared is 4 x 4 which equals 16.
It cannot be simplified any further, so it is: x² + 2x - 35
If you mean 2x2 + 3x = (3x - 1)2 - x2 Then you can solve it this way: Expand: 2x2 + 3x = 9x2 - 6x + 1 - x2 Group like terms: 2x2 + 3x = 8x2 - 6x + 1 6x2 - 9x - 1 = 0 Complete the square: 6x2 - 9x = 1 x2 - 3x/2 = 1/6 x2 - 3x/2 + 9/16 = 1/6 + 9/16 (x - 3/4)2 = 8/48 + 27/48 (x - 3/4)2 = 35/48 Solve for x: x - 3/4 = ± √(35/48) x - 3/4 = ± √(35/3) / 4 x = 3/4 ± √(35/3) / 4 x = [3 ± √(35/3)] / 4 If you mean something else, then you'll need to be clearer with your question.