Gcf Factoring

What is the GCF of 10a²b³ and 20a²b²?

• 20a²b³

• 10a²b³

• 20ab²

• 10a²b²

To find the Greatest Common Factor (GCF), you list the factors of two or more numbers and pick the SMALLEST number that appears in all lists: true or false?

• True

• False

Find the GCF of 12 and 20.

• 1

• 5

• 2

• 4

Find the GCF of 6, 9, and 12.

• 1

• 3

• 6

• 9

Factor by GCF:
10x² + 15x - 5

• 25(10x³+45x-15)

• 5(2x³ + 3x²-x)

• x(10x³+15x-5)

• 5(2x²+3x-1)

8r³ + 16r²

^{What is the factored form?}

• 4r²(2r + 4)

• 8r²(r + 2)

• 8(r³ + r²)

• 4(r³ + 2r²)

What is ALWAYS the first step when factoring?

• Look for the GCF

• Write a, b, and c

• Difference of squares

• Group

Factor 7x + 21 using the GCF

• 7(x+3)

• 7x + 3

• 3(x + 7)

• x(7 + 3)