![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
The expression is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=44da15145eb05014269e55b6b4d56758.png\")
Substitute the value of y= 4 and z= 5.
\The expression is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=868e294e9c64aaa9ecd08c074345148c.png\")
To simplify the expression follow the order of operations: (PEMDAS)
\1. Evaluate the expressions inside Brackets/Parenthesis (P).
\2. Evaluate Powers/Exponents (E).
\3. Multiply and/or Divide in order from left to right (MD).
\4. Add and/or Subtract in order from left to right (AS).
\A simple technique for remembering the order pf operations is turned into phrase
\“Please Excuse My Dear Aunty Sally”
\![\"\"](\"/userfiles/image/steps_images/step2.JPG\")
First operation is evaluating the expression within the parenthesis.
\=![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c9044e1b26a0c70cf31bfefc0852700b.png\")
(Subtract: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c75f2869cf7dce983438f39036e1cb5e.png\")
)
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=57815117303db168da4a33c7aa192472.png\")
(Power: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=566dcf32bd2af028f480690e5ab23e36.png\")
)
Next operation is addition.
\=20 (Add: 4+16=20)
\![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
The value of given expression is 20.
\