Question

solve the following according to th given Evaluate Using Suitableldentities 1.(2a+7) (2a-7) 2.(b-2^2)​

Answer 1

Answer:

1. 4a2-49

2. b-4

Step-by-step explanation:

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Answer 2

Answer:

1. 4a²-49

2. b²-4b+4

Step-by-step explanation:

1. (2a+7) (2a-7)

Solution:

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

2. (b-2)²

Solution:

$(b-2)² = {b}^{2} - 2 \times b \times 2 + {2}^{2} \\ = {b}^{2} - 4b + 4$

I hope it helps you.

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