Answer:
(x-6)(x-9)
Step-by-step explanation:
To find the factors of the expression, split the quadratic into two binomials which multiply to make it of the form (x+a)(x+b). To find a and b, find two numbers that multiply to 36 and add to -15. These two numbers are -6 and -9. Then write in the form (x-6)(x-9).
