Mathematics: Of the 585 people that live in Benton, 187 live within two miles of the post office. Use mental math to find how many people live farther than two miles from the post office.

Of the 585 people that live in Benton, 187 live

SAMANTHA8997

02.06.2021

It clearly states to use mental math not sorry bro can't do anything for you

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dolphin5836

05.05.2021

It can't be expressed in that form

Step-by-step explanation:

From difference of two squares:

${ \boxed{(a + b)(a - b) = ( {a}^{2} - {b}^{2} )}}$

a » 9

b » 2i

$(9 + 2i)(9 - 2i) = \{ {(9)}^{2} - {(2i)}^{2} \} \\ \\ = (81 - 4 {i}^{2} )$

but i² is -1 [ complex numbers ]

$= \{81 - 4( - 1) \} \\ = 81 + 4 \\ = 85$

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