Killakyle4744
24.06.2019 •
Mathematics
What is the factored form of the expression? 16b^2 – 81
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Ответ:
(4b-9) (4b+9)
Step-by-step explanation:
16b^2 – 81
This is the difference of squares
(a^2 -c^2) = (a-c) (a+c)
a^2 = 16b^2 so a= 4b
c^2 = 81 so c = 9
(16b^2 – 81) = (4b-9) (4b+9)
Ответ:
78
Step-by-step explanation: 156 divided by 2 is 78. so 78 is your answer.
have a nice day!