How do you evaluate #8^ { 2} - 25+ 4( - 3)#?

2 Answers
G_Ozdilek · EZ as pi
Dec 18, 2017

Follow explanation.

Answer is #27#

Explanation:

Arrange the expression

#8^2 - 25 + 4times(-3)#

#=64 - 25 - 12#

#=64-37#

#=27#

You can also express your expression as

#8^2 - 5^2 + 2^2times(-3)#

#=8^2 - 5^2 - 3times2^2#

EZ as pi
Dec 18, 2017

#27#

Explanation:

With an expression that has different operations, always count the number of TERMS first. Simplify each term to a single answer and then add or subtract those answers in the last line.

This expression has #3# terms. Simplify each one:

#" "color(blue)(8^2)" " color(green)(-" "25)" "color(red)(+" "4(-3)#

#=color(blue)(64)" " color(green)(-" "25)" "color(red)(-" "12)#

It helps to arrange the terms so that the additions are at the beginning and the subtractions are at the end. This is already the case, so now work from left to right..

#= 39" "-" "12#

#=27#

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