alopz2413 alopz2413

09-04-2020
Mathematics

contestada

Multiply: (5t - 4)(4t + 5)
What is the product?
A. 20t^2 + 9t – 20
B. 20t^2 + 18t – 19
C. 20t^2+ 251 4 36
D. 20t^2 + 41t - 20

Respuesta :

MuridCikgu MuridCikgu

09-04-2020

Answer:

A. 20t² + 9t - 20

Step-by-step explanation:

(5t × 4t) + (5t × 5) - (4 × 4t) - (4 × 5)

= 20t² + (25t - 16t) - 20

= 20t² + 9t - 20 (A)

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