Special identities

Expand (x +5)(x−5).

• x²−5

• x²+5

• x²+25

• x²−25

Expand (4x − 5)(4x + 5).

• 4x² − 25

• 4x² + 25

• 16x² + 25

• 16x² − 25

Expand (3x −½)(3x +½).

• 9x² −½

• 9x² −¼

• 9x² + ½

• 9x² +¼

Expand ( x + 2)².

• x² + 2²

• x² + 2x +2

• x² + 4x +2

• x² + 4x +4

Expand (x−4)².

• x² −8x+16

• x² −8x−16

• x² +8x+16

• x² −16

Tags

CCSS.HSA.APR.C.5

Expand (2x + 1)².

• 4x² +4x +1

• 4x² +1

• 4x² +2x +1

• 4x² +4x +2

(x - 8) ( x - 8) = ______

• x² - 64
• x² + 64
• x² - 16x + 64
• x² + 16x + 64

Expand (3x − 5)².

• 9x² − 30x +25

• 9x² − 30x −25

• 3x² − 30x −25

• 3x² + 30x −25

When you multiply these factors (7r+6)(7r-6)...

• The middle term will double
• The middle term subtracts to 0
• These factors can not be multiplied
• All the terms are positive

Tags

CCSS.HSA.APR.A.1

CCSS.HSA.SSE.A.2

When you multiply
(x-4)² ...

• The middle term subtracts to 0
• The middle term will double
• This can not be multiplied
• All the terms are positive

Tags

CCSS.HSA.APR.A.1

CCSS.HSA.APR.C.5