Simplify.... ( 3x^7-6x^5+9x-2)+(2x^6+8x^5-5x^2+6)?

Question

i think this might be the answer but im might be wrong i dont know...

3x^7-2x^6-14x^5+5x^2-9x-8

i dont know if u can see the full question so here it is again

(3x^7-6x^5+9x-2)+(2x^6+8x^5-5x^2+6)

Answer 1

(3x^7-6x^5+9x-2)+(2x^6+8x^5-5x^2+6) =
3x^7 - 6x^5 + 8x^5 - 5x^2 + 9x - 2 + 6 =
3x^7 + 2x^5 - 5x^2 + 9x + 4

Answer 2

How come you get a minus 2 x^6 ?
Looks like you inverted the signs in the second bracket (as if the signe between the brackets was a - instead of a +

(3x^7-6x^5+9x-2)+(2x^6+8x^5-5x^2+6)
3x^7 + 2x^6 + 2x^5 + [ 0 x^4 + 0 x^3] - 5x^2 + 9x +4

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There appears to be a root around
x = -0.3679694058553844...

Answer 3

3x^7 + 2x^6 + 2x^5 - 5x^2 + 9x + 4

Answer 4

(3x^7-6x^5+9x-2)+(2x^6+8x^5-5x^2+6) open up the brackets
= 3x^7-6x^5+9x-2 + 2x^6+8x^5-5x^2+6 sort out according to power
= 3x^7 +2x^6 -6x^5+8x^5 -5x^2 +29x -2+6 do the +s & -s
= 3x^7 +2x^6 +2^5 -5x^2 +29x +4

Answer 5

(3x^7 - 6x^5 + 9x -2) + (2x^6 + 8x^5 - 5x^2 + 6)

answer: 3x^7 + 2x^6 + 2x^5 - 5x^2 + 9x +4

your mistakes:
-2x^6
-14x^5
5x^2
-9x
-8

Your answers would be correct if the brackets were seperated by a minus sign. Maybe you misprinted it.

Answer 6

3x^7+2x^6+2x^5-5x^2+9x+4

Answer 7

(3x^7-6x^5+9x-2)+(2x^6+8x^5-5x^2+6)

3x^7+2x^6-5x^2+9x+4

Answer 8

Being a math instructor i'm unlikely to respond to the question, commonly via fact i think of you're a pupil! as properly, is the final set in parenthesis best? Is it 2x or 2 situations something? you in ordinary terms might desire to stay with the order of operations. For working in the parenthesis you commence variety the beginning up of the order of operations. in the top you group by utilising addition or subtraction each and all the like words. Order of Operations: a million. Exponents 2. each little thing in parenthesis 3. Multiplication and branch from left to good 4. Addition and subtraction from left to good. i wish that facilitates. i individually does no longer elect to respond to till you made it clean what is going on in the 0.33 set of parentheses!