I want to know hot solve this problem

I think the answer is A but can be simplified as seen in my photo above

Answer

C

Step-by-step explanation:

( factorise numerator and denominator )

w^2 - 9 ← is a difference of squares and factors as

w² - 9 = (w - 3)(w + 3)

w² - 4w - 21

Consider the factors of the constant term (- 21) which sum to give the coefficient of the w- term ( - 4)

The factors are - 7 and + 3 , since

- 7 × + 3 = - 21 and - 7 + 3 = - 4 , then

w² - 4w - 21 = (w - 7)(w + 3)

Then

← cancel the common factor (w + 3) on numerator/ denominator

= → C

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