Question

3. Expand:
(1) (2t+5)(2t-5)
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Answer 1

Step-by-step explanation:

(2t+5)(2t-5)

= (2t)^2-(5)^2

= 4t^2-25

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Answer 2

Step-by-step explanation:

(2t+5)(2t-5)

2t(2t-5) + 5(2t-5)

4t^2 - 10t + 10t - 25

4t^2 - 25