x=5/2
or 2.5
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x2 - 5x = 0x (x - 5) = 0x = 0andx = 5
x2 + 10x = 0 x2 + 10x + 25 = 25 (x + 5)2 = 25 x + 5 = +-5 x1 = 0 x2 =10
x2 - 10x + 25 = 0(x - 5)(x - 5) = 0x - 5 = 0x = 5
To find the value of the unknown number, you would divide 325 by 5. This gives you the value of the unknown number, which is 65. Therefore, 5 times 65 equals 325.
x2-5-4x2+3x = 0 -3x2+3x-5 = 0 or as 3x2-3x+5 = 0