Question

Find the difference.

(16x3 + 2x2) − 4x3 =

Answer 1

you have 16 x^3 's and take away 4 x^3 's
how many x^3 's do you have left ?

Answer 2

by the commutative rule, addition and subtraction can go in any order, so

a+b+c = a+(b+c) = (a+b)+c

here we have

(16x3 + 2x2) − 4x3 = (16x3 - 4x3) + 2x2

so just add them up

for example if I had

3a3 - 2a3 this would give a3

Answer 3

i suck at algebra so soory if i dont get it at first. okay so yall saying to just add them. this is what i got 16x3+2x2=18x2-4x2 and this equals 12x2

Answer 4

almost. you can combine (add or subtract) the same things
like 2 cows plus 1 cow is 3 cows
but 2 cows plus 1 horse is not 3 cows (nor 3 horses), it has to stay 2 cows + 1 horse

Answer 5

does that idea make sense ?

if so, you next need to know "what are the same thing" in algebra

if you have the same letter "x" as in
2x + 1x (or just 2x + x) that is the same thing

a different letter would be different: x+y can't be simplifed

the other way to be different:
x*x (x times x) is *not* the same as x
or in general x*x*x is not the same as x or x*x
we usually use the "little number in the upper right" to write x*x*x as \( x^3\)

Answer 6

in your problem
\[ (16x^3 + 2x^2) − 4x^3 = \]
you have
\[ 16x^3 - 4x^3 \]
can you simplify that ?

Answer 7

yes i can thank you so much for the help!!!

Answer 8

you should bet
12x^3
and you also have + 2x^2
but x^3 's are different from x^2 so you are done:
\[ 12x^3 + 2x^2 \]

Answer 9

*should get

Answer 10

thanks this was a big help since im taking online classes