SOLUTION: Find 3 consecutive odd integers if the difference of the squares of the least and greatest is 120.

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Question 1134352: Find 3 consecutive odd integers if the difference of the squares of the least and greatest is 120.
Found 3 solutions by Alan3354, ankor@dixie-net.com, MathLover1:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Find 3 consecutive odd integers if the difference of the squares of the least and greatest is 120.
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(n+4)^2 - n^2 = 120
8n + 16 = 120
n = 13

Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Find 3 consecutive odd integers
a, (a+2), (a+4)
if the difference of the squares of the least and greatest is 120.
(a+4)^2 - a^2 = 120
FOIL (a+4)(a+4)
a^2 + 8a + 16 - a^2 = 120
8a = 120 - 16
a = 104/8
a = 13 is the 1st odd integer
then, obviously
15 and 17 are the next two
:
:
Check on your calc: 17^2 - 13^2 =

Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

Find 3 consecutive odd integers if the difference of the squares of the least and greatest is 120.

To determine these integers, we start by letting the first odd integer be x. Then we can represent the three consecutive odd integers as x,+x+%2B+2, and x+%2B+4.
the squares of the least and greatest is:x%5E2 and %28x+%2B+4%29%5E2
if the difference of the squares of the least and greatest is 120, we have
%28x+%2B+4%29%5E2-x%5E2=120
x%5E2+%2B+8x%2B16-x%5E2=120
cross%28x%5E2%29+%2B+8x%2B16-cross%28x%5E2%29=120
+8x=120-16
+8x=104
+x=104%2F8
+highlight%28x=13%29
then +highlight%28x+%2B+2=15%29, and highlight%28x+%2B+4=17%29
your odd integers are: +highlight%2813%29, +highlight%28+15%29, and highlight%28+17%29