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rodikova [14]
3 years ago
13

Factor completely. 5x2 - 45 5(x + 3)(x - 3) 5(x2 - 45) 5(x - 9)(x + 9) (5x + 9)(x - 5)

Mathematics
2 answers:
stellarik [79]3 years ago
4 0
5x^2 - 45 = 5(x^2 - 9) = 5(x^2 - 3^2) = 5(x - 3) (x + 3)


Answer:  5(x - 3) (x + 3)
Leona [35]3 years ago
4 0

Answer:

Option A is correct

5(x+3)(x-3)

Step-by-step explanation:

Using identity rule:

(x^2-a^2) = (x-a)(x+a)

To factor completely:

5x^2-45

Take 5 common out we have;

5(x^2-9)

Apply the identity rule

then;

5(x+3)(x-3)

Therefore, the complete factored of the given equation is: 5(x+3)(x-3)

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