Checking my math again.

belle<3

New member
Joined
Aug 27, 2007
Messages
17
Evaluate [(y + 3)2 – 9] ÷ 8 when y = 4.
[(y + 3)2 – 9] ÷ 8
[(4 + 3)2 – 9] ÷ 8
[(7)2 – 9] ÷ 8
[49 – 9] ÷ 8
[40] ÷ 8
40 ÷ 8
= 5

:roll: Am I right? Do the brackets mean anything?
 

Subhotosh Khan

Super Moderator
Staff member
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Jun 18, 2007
Messages
18,149
belle<3 said:
Evaluate [(y + 3)2 – 9] ÷ 8 when y = 4.

[(y + 3)2 – 9] ÷ 8 ...Is that (y+3)[squared] ?
[(4 + 3)2 – 9] ÷ 8
[(7)2 – 9] ÷ 8
[49 – 9] ÷ 8
[40] ÷ 8
40 ÷ 8
= 5

:roll: Am I right? Do the brackets mean anything?
 

Denis

Senior Member
Joined
Feb 17, 2004
Messages
1,495
You're right if (y + 3)2 means (y + 3) squared;
next time, MAKE SURE you post these like this: (y + 3)^2

Brackets mean you must perform the operations inside the brackets first.
 

belle&lt;3

New member
Joined
Aug 27, 2007
Messages
17
yes

I was supposed to write squared. sorry.
 
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