Yo i have no idea what this is. please help

X=8

Step-by-step explanation:

Cross multiply:

4 * 6 = x * 3

Simplifying

4 * 6 = x * 3

Multiply 4 * 6

24 = x * 3

Reorder the terms for easier multiplication:

24 = 3x

Solving

24 = 3x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-3x' to each side of the equation.

24 + -3x = 3x + -3x

Combine like terms: 3x + -3x = 0

24 + -3x = 0

Add '-24' to each side of the equation.

24 + -24 + -3x = 0 + -24

Combine like terms: 24 + -24 = 0

0 + -3x = 0 + -24

-3x = 0 + -24

Combine like terms: 0 + -24 = -24

-3x = -24

Divide each side by '-3'.

x = 8

Simplifying

x = 8

- 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

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