Simplifying polynomials

(4x+1)(5x−2) (a)  

• 20x2 + 3x − 2
• 20x2 − 11x + 5
• 20x2 − 18x + 2
• 20x2 − 3x − 2

(5x+1)(x+4) (a)  

• 5x2 + 19x − 4
• 5x2 + 21x + 4
• 5x2 + 4
• 5x2 − 19x − 4

Simplify the expression.-3x2( 7x2 - x + 4) (a)  

• -21x4 + 3x3 -12x2
• 7x2 - x + 4 (-3x2)
• 21x4 + 3x3 + 12x2
• -12x2 + 3x3 -21x4

(5x+2)(x²-3x+6)

• 5x³ - 17x² +24x +12
• 5x³ + 17x² - 24x +12
• 5x³ - 13x² + 24x +12
• 5x³ +13x² - 24x - 12

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

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

What is the perimeter of the triangle shown?

• 9r²+r-5
• 9r⁴+r²-4
• 9r²-r+4
• 9r²+r-4

Find the area of the rectangle.

• 8x² + 14x + 6
• 12x + 10
• 8x² + 6
• 6x² + 14x + 6

3x³y(x² – 4x – 5) 

• 3x⁵y - 12x⁴y - 15x³y
• 4x⁵y - 12x⁴y - 15x³y
• 4x⁵y - 27x³y 
• 3x⁵y - 12x³y - 15x³y

(x + 3)(x - 2)

• x² + 5x - 6
• x² + x + 1
• x² + x - 6
• x² + 5x + 1

LAST ONE!
(2 – x ) (x³ + 2x + 8)

• -x⁴ + 2x³ - 12x - 2x² + 16
• x⁴ + 2x³ - 4x - 2x² + 16
• -x⁴ + 2x³ - 4x - 2x² + 16
• -x⁴ + 2x³ - 4x + 2x² + 16