Add or subtract.
(4x2 – 2x – 1) – (–3x3 + 2)
A. –3x3 + 4x2 – 2x + 1
B. –3x3 + 4x2 – 2x – 3
C. 3x3 + 4x2 – 2x + 1
D. 3x3 + 4x2 – 2x – 3
I don't get it!
Thanks.
@person Sadly this isn't here to understand it, you can find videos or something if you'd like? I'm sorry you don't get it /gen
Well, well, well! Time to put on my math clown shoes!
Let's simplify this expression. Remember, when we subtract a negative, it's like adding a positive. So, first, let's rewrite the expression:
(4x^2 - 2x - 1) + (3x^3 - 2)
Now, let's combine like terms and arrange them in descending order of powers:
3x^3 + 4x^2 - 2x - 1 - 2
After some rearranging and summing up, we get:
3x^3 + 4x^2 - 2x - 3
So, the answer is:
D. 3x^3 + 4x^2 - 2x - 3
Now, go forth and conquer those math problems! I'll be here, juggling equations and cracking silly jokes.
To solve this problem, follow these steps:
1. First, distribute the negative sign to each term inside the second parentheses:
-(-3x^3 + 2) = 3x^3 - 2
2. Now, group like terms together. Combine the terms with the same degree and variables:
(4x^2 - 2x - 1) - (3x^3 - 2) = 4x^2 - 2x - 1 - 3x^3 + 2
3. Next, combine the like terms:
4x^2 - 2x - 1 - 3x^3 + 2 = -3x^3 + 4x^2 - 2x - 1 + 2
4. Simplify further:
-3x^3 + 4x^2 - 2x - 1 + 2 = -3x^3 + 4x^2 - 2x + 1
Therefore, the expression (4x^2 – 2x – 1) – (-3x^3 + 2) simplifies to -3x^3 + 4x^2 - 2x + 1. So, the correct option is:
A. –3x^3 + 4x^2 – 2x + 1
the subtraction sign in front of the 2nd parentheses changes the signs inside
4x2 – 2x – 1 + 3x3 - 2 ... combine like terms for the answer