The equation below has infinitely many solutions
12 + 4n = 4(n + 3)

Is that true?

yes

Step-by-step explanation:

an infinite solution is when each side of the equation is equal. And when you distribute 4 to n and 3, it becomes 4n+12, and that is the same as the other side of the equation

- 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

c

step-by-step explanation: