Unit 7

Factor out the GCF  $4x^2+16x-10$  

• 2

• 4

• 4x

• x

 $13x^2-26x+39$  Factor out the GCF

• 13x

• 1x

•  $1x^2$  

• 13

What is the 1st step in factoring a trinomial?

• Multiply a and c

• Find the factors of a and c

• Factor out the common binomial

• Use the "split" or "box" method

Factor $6x^2-11x+4$ 

•  $\left(4x-3\right)\left(2x-1\right)$  

•  $\left(x+8\right)\left(x-3\right)$  

•  $\left(x-6\right)\left(x-4\right)$  

•  $\left(x+6\right)\left(x-4\right)$  

 $What\ is\ 7\ x\ 9?$  

• 63

• 16

• 49

• 27

What is the square root of 49?

• 7

• 5

• 8

• 6

Factor $81x^2-144$  

•  $\left(9x+12\right)\left(9x-1\right)$  

•  $\left(9x-12\right)\left(9x+12\right)$  

•  $\left(3x-12x\right)\left(x-10\right)$  

•  $\left(12x+4\right)\left(x-4\right)$  

Factor $b^2+4$  

•  $\left(b+2\right)^2$  

•  $Cannot\ Factor\ correctly$  

•  $\left(3-b\right)\left(b+2\right)$  

•  $\left(b+2\right)\left(b-2\right)$  

What factors of 36 add to 15?

• 12, 3

• 6, 6

• 10, 5

• 18, -3

What factors of 100 add to -25?

• -20, -5

• 20, 5

• 30, -5

• -25, 4