What quadratic equation has roots of 7 and -2

The lengths of all sides of a triangle are integers when measured in decimeters. one of the sides has length of 1 dm and another of 3 dm. find the perimeter of the triangle.'

Select the conic section that represents the equation. 3x2 + 3y2 -2x + 4 = 0

When i'm with my factor 5, my prodect is 20 .when i'm with my addend 6' my sum is 10.what number am i