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(2 + X)(X + 8) - (5 + X)²
2X + 16 + X² + 8X - (25 + 10X + X²
X² + 10X + 16 - 25 - 10X - X²
- 9
ESO ES TODO, SALUDOS...............
(x+2)(x+8)-(x+5)²
x²+10x+16-(x²+10x+25)
x²+10x+16-x²-10x-25
-9