How do you evaluate #9^{2}-7^{2}2^{2}\times 3^{2}#?

1 Answer
Jim G.
Dec 20, 2017

#-1683#

Explanation:

#"when evaluating expressions with mixed operations "#
#"there is a particular order that must be followed"#

#"follow the order as set out in the acronym PEMDAS"#

#["P-parenthesis( brackets), E-exponents( powers")#
#"M-multiplication, D-division, A-addition, S-subtraction]"#

#rArr81-(49xx4xx9)larrcolor(red)"exponents"#

#=81-1764larrcolor(red)"multiplication"#

#=-1683larrcolor(red)"subtraction"#

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