ogedafmily ogedafmily

18-08-2020
Mathematics

contestada

Find the product:
(x+9)(x-9)
a 18
b. -81
C. - 18
d. x-64

Respuesta :

wegnerkolmp2741o wegnerkolmp2741o

18-08-2020

Answer:

x^2 -81

Step-by-step explanation:

(x+9)(x-9)

FOIL

first x*x = x^2

outer -9x

inner 9x

last -9*9 = -81

Add them together

x^2 -9x+9x -81

Combine like terms

x^2 -81

Answer Link

paimonmoney paimonmoney

18-08-2020

Answer: B

Step-by-step explanation:

Simply using (a-b)(a+b)=a^2-b^2.

Evaluate the power (9^2).

x^2 - 81

Answer Link

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