Find Missing Factors in (4x+8)(? + ?) = 4ax+8a+12x+24

Fill in the missing values:

(4x+8)(?+?)=4ax+8a+12x+24 (4x+8)(?+?)=4ax+8a+12x+24

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Complete the missing values
00:06 Let's factor 12 into factors 4 and 3
00:14 Let's factor 24 into factors 8 and 3
00:22 Let's mark the common factors
00:47 Let's take out the common factors from the parentheses
01:03 And this is the solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Fill in the missing values:

(4x+8)(?+?)=4ax+8a+12x+24 (4x+8)(?+?)=4ax+8a+12x+24

2

Step-by-step solution

To solve this problem, we'll follow these steps:

  • Step 1: Apply the distributive property to (4x+8)(b+c) (4x+8)(b+c)
  • Step 2: Match the expanded terms to 4ax+8a+12x+244ax + 8a + 12x + 24
  • Step 3: Solve for bb and cc

Now, let's work through each step:
Step 1: Use the distributive property to expand (4x+8)(b+c) (4x+8)(b+c) . This gives us:

(4x+8)(b+c)=4xb+8b+4xc+8c (4x+8)(b+c) = 4x \cdot b + 8 \cdot b + 4x \cdot c + 8 \cdot c

Step 2: Equate the expression from Step 1 to 4ax+8a+12x+244ax + 8a + 12x + 24:
4bx+8b+4cx+8c=4ax+8a+12x+24 4bx + 8b + 4cx + 8c = 4ax + 8a + 12x + 24

Separate and equate the coefficients for xx and the constant terms:

  • For xx: 4b+4c=4a+124b + 4c = 4a + 12
  • For constants: 8b+8c=8a+248b + 8c = 8a + 24

Step 3: Solve the resulting system of equations:

Divide each equation by its common factor: - 4b+4c=4a+124b + 4c = 4a + 12 becomes: b+c=a+3b + c = a + 3 - 8b+8c=8a+248b + 8c = 8a + 24 becomes: b+c=a+3b + c = a + 3

Both equations are identical, thus we only need one further condition to solve completely.

Match assumptions based on simplest composition of terms:
Assume b=ab = a and c=3c = 3 to verify this works correctly:

Substituting these into b+c=a+3b + c = a + 3 gives:
a+3=a+3a + 3 = a + 3, confirming our choice is consistent.

Thus, the solution to the problem for missing values is a,3 a,3 .

3

Final Answer

a,3 a,3

Practice Quiz

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Break down the expression into basic terms:

\( 4x^2 + 6x \)

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