Factoring Quadratics - Box Method

When using the box method to solve $x^2-6x+8$ , which of the following is correct?

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When solving $9x^2-4$ , which of the following is the correct set up when using the box method?

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Tags

CCSS.HSA.APR.C.4

What is the first step in factoring $6x^2+14x-12$  ?

• Multply a and c to get -36

• Factor out a GCF of 2

• Put the first term in the first box and last term in the last box

• Find the factors that multiply to -36 and add to 14

Identify the error:

• found the wrong factors of ac (-18)

• factors did not add to b (7)

• first term and last term entered incorrectly in the box

• Factored out the GCF in each column and row incorrectly

Using the box method, which is the correct way to solve $4x^2+9x+2$  

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Explain why $x^2+9x+1$  is prime/not factorable.

• Trick question, it IS factorable!

• There are no factors of 1 that add to 9

• There are no factors of 9 that add to 1

• There are no factors of 2 that add to 9

Which is the correct set up for factoring $10x^2+7x+1$ using the box method? 

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