Given that: (2t+5) (2t 5) #10; = 2t(2t 5) 5(2t 5) #10; = 4t^2 10t 10t+25 Hence 4t^2 20t+25 is the correct answer ...

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Algebraic Identities

Expand: 2t +...

Question

Expand: $(2 t + 5) (2 t - 5)$

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Solution

Given that: $(2 t + 5)$ $(2 t - 5)$
$=$ $2 t (2 t - 5) - 5 (2 t - 5)$
$=$ $4 t^{2} - 10 t - 10 t + 25$
Hence $4 t^{2} - 20 t + 25$ is the correct answer

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