Question

evaluate using sutiable identities
a) (2a+7) (2a-7)​

Answer 1

Answer:

Hey!! Ur answer;

$(2a + 7)(2a - 7) \\ = (2 {a}^{2} ) -( {7}^{2} ) \\ = 4 {a}^{2} - 49$

Step-by-step explanation:

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Answer 2

Answer:

hi

Step-by-step explanation:

we can use (a-b)^2=a^2-2ab+b