Answer:
20t^2 + 9t - 20
Explanation:
Original Equation:(5t - 4)(4t + 5)
Distributive property, multiply 5t and 4t and then 5t by 5
Actually, I'm gonna have a hard time explaining in writing, I'm just gonna take a picture of my math.
(5t-4)(4t+5)
= 20t^2 + 25t - 16t - 20
= 20t^2+9t-20
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