Answer :
Answer:
Step-by-step explanation:
1. Identify coefficients \( a = 1 \), \( b = -45 \), \( c = 324 \).
2. Find two numbers that multiply to \( 324 \) and add to \( -45 \).
3. The correct pair is \(-9\) and \(-36\).
4. Rewrite the expression: \( x^2 - 9x - 36x + 324 \).
5. Group terms: \( (x^2 - 9x) + (-36x + 324) \).
6. Factor each group: \( x(x - 9) - 36(x - 9) \).
7. Factor out the common binomial: \( (x - 9)(x - 36) \).