23-01-2019
Mathematics

contestada

What is the factored form of the expression?

49b^2 – 64

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wegnerkolmp2741o wegnerkolmp2741o

23-01-2019

Answer:

(7b-8) (7b+8)

Step-by-step explanation:

49b^2 – 64

This is the difference of squares

(a^2 -c^2) = (a-c) (a+c)

a^2 = 49b^2 so a = 7b

c^2 = 64 so c = 8

(49b^2 -64) = (7b-8) (7b+8)

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