Suppose a , b denote the distinct real roots of the quadratic polynomial x 2 + 20 x – 2020 and suppose c , d denote the …

Suppose a, b denote the distinct real roots of the quadratic polynomial x² + 20x – 2020 and suppose c, d denote the distinct complex roots of the quadratic polynomial x² – 20x + 2020. Then the value of ac(a – c) + ad(a – d) + bc(b – c) + bd(b – d) is