Question

Simplify the following expressions:
3(2x + 3 - x squared) - 2(2x squared - x- 3)

Answer 1

first, simplify the terms
\[3(2x + 3 -x^2) = 6x+9-3x^2\]and\[-2(2x^2 -x -3)= -4x^2 +2x +6\]

Answer 2

where do you get the = sign??

Answer 3

the left side is the original expression, on the right side the multiplied one
I could also have used "gets" or something

Answer 4

in total the multiplied expression looks like this
\[6x+9-3x^2 -4x^2 +2x +6\]

Answer 5

now i understand ;)

Answer 6

so we need to collect the powers if they have the same base??

Answer 7

YEP

Answer 8

still not sure of my answers.

Answer 9

\[8x+15-12x^{4}\] i think this solution is wrong.

Answer 10

where did you get \( -12x^4\)?

\(-4x^2-3x^2=?\) is not equal to \( -12x^4\) because you're adding them

Answer 11

i multiply the base and did addition on the two exponent.

Answer 12

year i now it wrong... i tried everything but still my answers are all wrong....can you please show me your working?? coz need to record it for me test next week.

Answer 13

\(-4x^3-3x^2\) is not the same as \((-4x^2)(-3x^2)\)
remember that when adding or subtracting variables, the exponents will be the same
BUT if you are multiplying or dividing the exponents will change

Answer 14

ok so it means that my answer is suppose to be -7xsquared +8x+15??

Answer 15

yep

Answer 16

phanta_seea, in her first post, typed out these two expressions:\[6x+9-3x^2\]\[-4x^2 +2x +6\]. All we need to do is to combine "like" terms. So, we'll arrange the "like" terms in columns:

- 3x^2 + 6x + 9
- 4x^2 + 2x +6
----------------
-7x^2 + 8x +15

Answer 17

This is the shortest way to do this problem.

Answer 18

thanks quys.