The expression is not factorable with rational numbers.
You take 90 + 75 = 165 and then 180 - 165 = 15 degrees so that’s your answer
Split it up
3x^2+12x-5x-20
group
(3x^2+12x)+(-5x-20)
factor
(3x)(x+4)+(-5)(x+4)
undistribute (x+4) like ab+ac=a(b+c)
(3x-5)(x+4)
Answer:
14 or also 1 year 2 months
