smayaanahmed31 smayaanahmed31 23-10-2021 Mathematics contestada The perimeter of a triangle is (x 3 + 2x 2 − x − 1) cm. The lengths of two sides are (7x 3 + 12x − 7) cm and (2x 3 − 3x 2 + 5x − 11) cm. Find the length of the remaining side of the triangle.