Review, integers, rules of signs, exponenrs and polynomial ex

(2x + 9) (2x - 9) =

Multiply:

(y + 9)²

• y² +18y + 81

• y² + 81

• y + 9

• y² +18y + 18

Multiply:
(3x − 6)(7x + 7)

• 21x² − 63x + 42
• 21x² − 21x − 42
• 21x² − 42
• 21x² + 63x + 42

Multiply:
(x + 4) (x - 2)

• x² - 2x - 8
• 2x + 2
• x² + 2x - 8
• x² + 6x - 8

Find the difference.
(x³ - x² + 4) - (3x³ - 2x² + 3)

• -2x³ - 3x² + 7
• -2x³ + x² + 1
• 2x³ - 3x³ - 1
• 4x³ - 3x² + 7

Find the sum. 
(3 - 2x + 2x²) + (4x - 5 + 3x²)

• 7x - 7x + 5x²
• 5x² + 2x - 2
• 5x²
• 5x² + 6x + 8

Simplify the expression
-6x - 5(10x + 3)

• -56x - 15
• -56x+15
• 44x+15
• -44x-15

Find the sum.
(3y² + y³ - 5) + (4y² -4y + 2y³ + 8)

• 3y³ + 7y² - 4y + 3
• 4y² + 3y³ - y + 3
• -y⁴ + 2y³ -y - 4
• 4y³ + 3y² -3y + 1

Multiply

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(3c²)(10c⁷)

• 13c⁹
• 30c⁵
• 30c⁹
• -30c⁹