11-2 = 1/11 x 1/11 = 8.2644628 x 10-3
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-1331.
(-5)2 = 25
-7p2 -2p3 + 5 is an expression, not an equation or inequality. An expression cannot be solved
An expression of the second degree can be any kind of expression, the most popular being a quadratic polynomial of the form ax^2 + bx + c.
substitution