6.4 Multiplying Polynomials

Simplify the expression 7k³(4k² - 3)

• 28k⁵ - 21k³

• 28k⁶ - 21k³

• 11k⁵ + 4k³

• 8k - 4

Simplify the expression

2x²(x + 5)

• 2x² + 5

• 2x² + 10x²

• 2x³ + 5

• 2x³ + 10x²

Simplify the expression

7x²y³(2x⁴y⁵ + 6xy³)

• 14x⁸y¹⁵ + 42x²y⁹

• 9x⁶y⁸ + 13x³y⁶

• 14x⁶y⁸ + 42x³y⁶

• 14x⁶y⁸ + 42x²y⁶

Simplify the expression 3x(5x² - 7x - 8)

• x² - 19x - 2x

• 15x³ - 21x² - 24x 

• 6x³ + 7x² - 13x + 8

• 5x³ - 19x² - x - 8

Simplify the expression

-3x²( 7x² - x + 4)

• -21x⁴ + 3x³ -12x²

• 7x² - x + 4(-3x²)

• 21x⁴ + 3x³ + 12x²

• -12x² + 3x³ -21x⁴

Simplify the expression

10x(2x² + 3x + 4)

• 20x³ + 30x² + 40x

• 20x² + 30x + 40

• 12x³ + 13x² + 14x

• 12x² + 13x + 14

Simplify the expression 5x(4x³ + 8) - 4x

• 9x⁴ + 40x

• 20x⁴ + 36x

• 20x⁴ - 20x² + 40

• 20x⁴ + 20x

Simplify the expression 5a(-3a² +  4a - 5 + 6a³) + 2(-3a + 4 + 10a² )

• -6a³ + 13a² + 4a + 9

• 30a⁴ + 5a³ + 7a² + 4a - 1

• -21a³ + 13a² + 4a - 1

• 30a⁴ - 15a³ + 40a² - 31a + 8

Simplify the expression 3ab(5a² – a – 2) + 2a(b + 1)

• 15a³b – 3a²b – 4ab + 2a

• 15ab – 3a² + 4ab²

• 15a³ – a²b – 4ab

• 8a³b – 3a²b – 2ab + a

Simplify the expression 5x(4x³ + 8) - 4x

• 9x⁴ + 40x

• 20x⁴ + 36x

• 20x⁴ - 20x² + 40

• 20x⁴ + 20x