Math  /  Algebra

QuestionSimplify the expression: 3(d4)+22d+1d3(d-4) + 2 - 2d + 1 - d

Studdy Solution

STEP 1

What is this asking? We need to simplify this expression with the variable dd, making it as short and sweet as possible! Watch out! Don't forget to distribute correctly and pay attention to the signs of each term.
Those little negative signs can be sneaky!

STEP 2

1. Distribute and Simplify
2. Combine Like Terms

STEP 3

Let's **distribute** that 33 across the parentheses (d4)(d-4).
Remember, distributing means multiplying the 33 by *each* term inside the parentheses.
This is because of the distributive property of multiplication over addition (and subtraction).
So, 3(d4)3(d-4) becomes 3d343 \cdot d - 3 \cdot 4, which simplifies to 3d123d - 12.

STEP 4

Now, let's rewrite the *entire* expression with the simplified part: 3d12+22d+1d3d - 12 + 2 - 2d + 1 - d.
Look how much cleaner that looks already!

STEP 5

Let's bring all the terms with dd together.
We have 3d3d, 2d-2d, and d-d.
Think of these as different piles of "d-stuff".

STEP 6

Now, let's add those "d-stuff" piles together: 3d2dd=(321)d=0d=03d - 2d - d = (3-2-1)d = 0d = 0.
Wow, the dd terms add to zero and disappear!

STEP 7

Let's round up those constant terms (the numbers without dd): 12-12, 22, and 11.

STEP 8

Adding those constants gives us 12+2+1=9-12 + 2 + 1 = -9.

STEP 9

So, after all that simplifying, our final answer is 9-9!

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