Question 45624
25x^2 + 35x + 12
The factors of the product of the leading coefficient and the constant must sum up to the linear term. {{{12*25 = 300}}}
25x^2 + 35x + 12
25x^2 + 15x + 20x + 12
(25x^2 + 15x) + (20x + 12)
5x(5x + 3) + 4(5x + 3)
(5x + 4)(5x + 3)