A quadratic equation with opposite solutions can be found by multiplying (x−r)(x+r) (r is a real number). The equation will have 1: a quadratic term and a constant term only (ax^2+c)
2: all three terms (ax^2+bx+c)
3: a quadratic term and a linear term only (ax^2+bx)
4: only a quadratic term (ax2)