contestada

What is the factored form of the expression? t2 – 81
A. (t + 9)(t – 9)
B. (t + 81)(t – 1)
C. (t + 9)2
D. (t – 9)2

Respuesta :

calculista
we have that
t² – 81

we know that
A difference of two perfect squares,  (A² - B²)  can be factored into  (A+B) • (A-B)
 let
A²-------> t²
B²-------> 9²
then
(t² – 9²)------->(t+9)*(t-9)

the answer is
(t+9)*(t-9)


jdvance

Answer:

a

Step-by-step explanation:

A. (t + 9)(t – 9)

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