Question

Use (a+b)(a-b) formula to find the value of (3a-5)(3a+5) 
plz help me out​

Answer 1

Step-by-step explanation:

$(3a - 5)(3a + 5) \\ = {(3a)}^{2} - {(5)}^{2} \\ = 9 {a}^{2} - 25$

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Answer 2

Answer:

$9a^{2}-25$

Step-by-step explanation:

$(a+b)(a-b)=(a^{2}-b^{2})$

$(3a-5)(3a+5)=(3a^{2}-5^{2})\\=9a^{2}-25$