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la ecuaciones
2x al cuadrado + 4X + 15 = 175
por lo tanto
2X2 +4x -160 = 0
resolvemos la cuadratica y nos da 8
2(8al cuadrado) + 4(8) +15 = 175
2(64) + 32 +15 = 175
128 +32+15 = 175