Question

express the following as in the form of (a+b)(a-b).
1. a²-64.
2. 20a²-45b²​

Answer 1

1. a²- 64

• a²- b² = a²- 4²
• (a+4)(a-4)

2. 20a² - 45b²

• a²- b² = (a+b)(a-b)
• (20a+45b)(20a-45b)

Answer 2

Step-by-step explanation:

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