Three polynomials are factored below, but some coefficients and constants are missing, All of the missing, values of a, b, c,
and d are integers.
1. x²+2x-15 = (ax + b)(cx + d)
2. 2x³ +6x²-20x = 2x(ax + b)(cx + d)
3. 9x² +21x+6= (ax + b)(cx + d)
Fill in the table with the missing values of a, b, c, and d.
d