b^3 - 25b^2 - 4b + 100 = 0 b = 25 or b = -2
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This question is incomplete. 2x2 + 3x - 100 can not be solved unless you tell us what it is equal to.
100 squared (100 x 100) = 10,000
10-2 = 1 / 102 = 1/100
-25
That's going to depend on the value of 'x'. But no matter what 'x' is, (x2-100) will be equal to the product of (ten more than 'x') and (ten less than 'x').