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How Do You Factor a Polynomial Using the A-C Method?
Factor 8x2-10x+3 using the A-C method.
Summary
- To start the A-C method we multiply the two coefficients A and C together
- We must find the factors of 24, and then find the sum of each pair of factors
- Multiplying two negative numbers together gives us a positive number, so each pair has a negative version
- Factor our rewritten polynomial using grouping
- Factor out the common factor (2x-1)
- FOIL our answer to see if we get what we started with

Notes
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- GCF stands for greatest common factor
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- GCF stands for greatest common factor
- Our three terms, 8x2, -10x, and 3 do not share a GCF that we can factor out
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- There are two criteria for standard form:
- 1) All like terms must be combined
- 2) The degrees of each term must decrease from left to right
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- This is the first criterion for being in standard form
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- This is the second criterion for being in standard form
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- This is the second criterion for being in standard form
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- The first term is 8x2
- The second term is -10x
- The third term is 3
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- This is the beginning of the A-C method
- A = 8
- C = 3
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- A = 8
- C = 3
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- Finding a sum means that we are just adding numbers together
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- Finding a sum means that we are just adding numbers together
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- B is equal to -10
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- We are going to replace -10x with -4x and -6x
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- 4x is a common factor of 8x2 and -4x
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- 4x is a common factor of 8x2 and -4x
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- -3 is a common factor of -6x and 3
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- We can FOIL our answer to see if it is correct
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- Our binomials are (2x-1) and (4x-3)
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- We are FOILing together (2x-1) and (4x-3)
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