If you mean: 2x^2 -5x = 35 then 2x^2 -5x -35 = 0 and by using the quadratic equation formula the value of x is (5-square root 305)/4 or (5+square root 305)/4
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The number is -13.
pi it's so easy
Minus 25 (5x5=25 if there is one minus then the answer is minus).
It is minus 20.
A square unit is a unit when squared equals a perfect square number. 5 is a square number, five times five is 25. Divid or square root 25 and you get 5. now technicaly every number is a square number but it is generally considered only whole numbers.