(x + 3)(4x + 5)
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(x + 1)(x + 3)(x - 5)
That doesn't factor neatly. Applying the quadratic equation, we find two real solutions: (0 plus or minus 2 times the square root of 5) divided by 5. x = 0.89442719 x = -0.89442719 If you had an x in there, it would come out nicer. 5x2 + x - 4 = (x + 1)(5x - 4)
15(p + 4)
15 x 45 = (15 x 40) + (15 x 5)
15 x 11