Write the expressions in the product form using the reasoning methods from the previous problem.

a) [[$ x^2 + 7x + 12 = $]] ()()

b) [[$ x^2 - 8x + 12 = $]] ()()

c) [[$ x^2 + 4x -12 = $]] ()()

d) [[$ x^2 + 3x -10 = $]] ()()