Factoring

Solve
a² + 10a + 21 = 0

• ± √21
• -3 , -7
• 3 , 7
• 28 , -7

Tags

CCSS.HSA.REI.B.4

x⁵ + x⁴ + x²

• x³(x² + x + 1)

• x(x⁴ + x³ + x)

• x²(x³ + x²)

• x²(x³ + x² + 1)

Tags

CCSS.HSA.APR.A.1

CCSS.HSA.SSE.A.2

CCSS.HSA.SSE.B.3

Factor by grouping:

9x²-6x-8

• (3x+2)(3x-4)

• (3x+2)(3x+4)

• (3x-2)(3x-4)

• (x-1)(9x+8)

Tags

CCSS.HSA.APR.A.1

CCSS.HSA.SSE.A.2

CCSS.HSA.SSE.B.3

Factor:

5x²-15x+10

• (5x-2)(x-5)

• 5(x-2)(x+1)

• (5x+2)(x+5)

• 5(x-2)(x-1)

Tags

CCSS.HSA.SSE.A.2

CCSS.HSA.SSE.B.3

x² - 400

• ( x - 200) ( x + 200) 
• ( x + 20) ( x + 20) 
• Prime
• ( x - 20) ( x + 20) 

Tags

CCSS.HSA.SSE.A.2

CCSS.HSA.SSE.B.3

Which of the following is NOT a perfect square trinomial?

• x² – 16x + 64 
• x² – 10x + 20 
• x² – 28x + 196 
• x² – 24x + 144 

Tags

CCSS.HSA.SSE.A.2

CCSS.HSA.SSE.B.3

What is the first step in solving 
(x + 2)(x - 3) = 0      ?

• Plug in zero for x
• Solve for x
• FOIL
• Set each binomial factor equal to zero

Tags

CCSS.HSA.REI.B.4

Solve 
x³ - 2x² - 4x + 8 = 0

• x = 2, -2
• x = 2i, -2i
• x = 2
• Not Factorable

Factor
k²+7x+10

• (k+2)(k+5)
• (k-2)(k-5)
• (k+10)(k+4)
• (k+2)(k-5)

Factor

3x² + 18x +15

• 3(x² + 6x + 5)

• (x + 5)(x + 1)

• 3(x + 5)(x + 1)

• 3(x - 5)(x - 1)