Multiplying Polynomials / Multiplying Binomials

Simplify:
-3x²(5x² + 3x)

• -15x⁴ - 9x²
• -15x⁴ - 9x³
• 2x⁴ - 6x³

Simplify:
3x³(2x² + 9x + 6)

• 6x⁶ + 27x³ + 18x
• 6x³ + 18x² + 9
• 6x⁵ + 27x⁴ + 18x³
• 6x⁶ + 45x³ 

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

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

What is the product of these binomials?

(x-8)(x+3)=

• $x^2-5x-5$

• $x^2-5x-24$

• $x^2-11x-5$

• $x^2-11x-24$

(4x+1)(5x−2)

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

(x+5)²

• x²+25
• 2x+10
• x²+10x+25
• 12x