15 squared is 225.
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use your calculator!!! hahahaha.16 squared= 16x16= 256256 times 15=3840
15+15+15+15=60
Fifteen thousand, fifteen hundred, and fifteen dollars can be written numerically as $15,515. This is because fifteen thousand is written as 15,000, fifteen hundred is written as 1,500, and fifteen is written as 15. When you add these numbers together, you get a total of 15,000 + 1,500 + 15 = 15,515.
9x squared-15x squared = -6