186k views
1 vote
What is the simplest form of (4x^3 + 6x - 7) + (3x^3 - 5x^2 - 5x + 9)

User Jobmo
by
3.9k points

2 Answers

1 vote
1 Remove parentheses.
4
x
3
+
6
x

7
+
3
x
3

5
x
2

5
x
+
9
4x
​3
​​ +6x−7+3x
​3
​​ −5x
​2
​​ −5x+9

2 Collect like terms.
(
4
x
3
+
3
x
3
)
+
(
6
x

5
x
)
+
(

7
+
9
)

5
x
2
(4x
​3
​​ +3x
​3
​​ )+(6x−5x)+(−7+9)−5x
​2
​​

3 Simplify.
7
x
3
+
x
+
2

5
x
2
7x
​3
​​ +x+2−5x
​2
​​
User Malcolm Boekhoff
by
4.2k points
5 votes

Simplest form:

7 x^3 − 5 x^2 + x + 2

User Sanbornc
by
4.5k points