28y^2 + 25 + 3 =?
28y^2 + 25y + 3 = (7y+1)(4y+3)
Ideas: 28*3 = 21*4, and 21+4 = 25, the coefficient of y.
28y^2 + 25y + 3 = 28y^2+21y + 4y+3 = 7y(4y+3) + (4y+3) = (7y+1)(4y+3)
28y^2 + 25 + 3 =?
28y^2 + 25y + 3 = (7y+1)(4y+3)
Ideas: 28*3 = 21*4, and 21+4 = 25, the coefficient of y.
28y^2 + 25y + 3 = 28y^2+21y + 4y+3 = 7y(4y+3) + (4y+3) = (7y+1)(4y+3)