Y= 6x
2x + 3y = -20
substitution

x = -1, y = -6

Step-by-step explanation:

y = 6x

2x + 3y = -20

Substitute 6x for "y" in the second equation:

2x + 3(6x) = -20

2x + 18x = -20

20x = -20

x = -1

Next, substitute -1 for "x" in the first equation:

y = 6(-1)

y = -6

step-by-step explanation:

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form