Type the correct answer in each box. Use numerals instead of words.

Multiply the expressions.

3x^{2} + 2x -21 \frac{x}{y} -2x^{2} - 2x + 12 - 2x^{2} + 25 + 63 \frac{x}{y} 6x^{2} + 7x - 49 If a = 1, find the values of b, c, and d that make the given expression equivalent to the expression below. ax + b
cx + d
b = , c = , and d =