9 squared is 9 x 9 or 81.
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9 squared is 81 and 16 squared is 256
-9 squared = 81(-9)^2 = (-9) * (-9) = 81
9 squared (or 92) = 9 x 9
This is equivalent to (x + 3)2 = (x + 2)2 + 9. Multiplied out this is x2 + 6x + 9 = x2 + 4x + 4 + 9. Deduct x2 + 4x + 9 from each side giving 2x = 4 So x = 2 Check: (2 + 3) squared = 25 which is 9 more than (2 + 2) squared = 16.
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