Algebra Polynomial Identities

(x² - y²) × (x² + y²) = ______

• 2x² + 2y²
• x⁴ - y⁴
• x⁴ + y⁴
• 2x⁴

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

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

The degree of the polynomial:  4x²y + x² - 2y² is ______

• 2
• 3
• 4
• -2

Expand (4x − 5)(4x + 5).

• 4x² − 25

• 4x² + 25

• 16x² + 25

• 16x² − 25

Expand (x−4)².

• x² −8x+16

• x² −8x−16

• x² +8x+16

• x² −16

(51)² - (49)² is

• 200

• 150

• 276

• 189

The identity (y + a) (y +b) is

• y² + ( a - b )y + ab

• y² - ( a + b )y + ab

• y² + ( a + b )y - ab

• y² + ( a + b )y + ab

The product of (a+b) and (a-b) is

• a²+b²

• a²-b²

• ab+bc

• none of these