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Evaluating Arithmetic Expression

Britt

New member
May 15, 2013
1
I need help figuring out what the little 2 next to an equation means this is what my problem looks like I have the answer but I can't figure out how it was found out. (3)(-4)2 - (3)(-5) so the 2 next to the 4 in parentheses is little.
 

Ackbach

Indicium Physicus
Staff member
Jan 26, 2012
4,202
I need help figuring out what the little 2 next to an equation means this is what my problem looks like I have the answer but I can't figure out how it was found out. (3)(-4)2 - (3)(-5) so the 2 next to the 4 in parentheses is little.
Do you mean $(3)(-4)^{2}-(3)(-5)?$ If so, the small raised '2' is an exponent. That is a shorthand notation for multiplying something by itself a certain number of times.
 

SDAlgebra

New member
May 2, 2021
3
My tip: BIMDAS!!!

-4 squared is 16 as I have shown. And then open the brackets. (3)(16) - 3 + 5

3x16 = 48

-3+5 = 2

48 + 2 = 50

But yeah, as Ackbach said, a little 2 is a squared sign meaning to multiply it by itself.
 

jonah

Active member
Feb 21, 2015
109
Beer soaked ramblings follow.
My tip: BIMDAS!!!

-4 squared is 16 as I have shown. And then open the brackets. (3)(16) - 3 + 5

3x16 = 48

-3+5 = 2

48 + 2 = 50

But yeah, as Ackbach said, a little 2 is a squared sign meaning to multiply it by itself.
8 year old thread revived.
 

Country Boy

Well-known member
MHB Math Helper
Jan 30, 2018
861
And apparently revived to give the wrong answer!

The original problem was $(3)(-4)^2- (3)(-5)$.
The -5 is multiplied by -3, not subtracted from it.
3(16)+ 15= 48+ 15= 63, not 50.