Question

2x³ - 9x² + 8, 3x² - 6x - 5, 7x³ - 10x + 1 and 3 + 2x - 5x² - 4x³​

Answer 1

Answer:

7x^3+2x^3-4x^3-9x^2+3x^2-5x^2-6x-10x+2x+8-5+1

5x^3-11x^2-14x+4

Answer 2

Answer:

x = -0.72

Step-by-step explanation:

2x³ - 9x² + 8, 3x² - 6x - 5, 7x³ - 10x + 1 and 3 + 2x - 5x² - 4x³​

6x - 18x + 6x - 6x - 5 + 21x - 1 = 3 + 2x - 10x - 12x

-12 - 5 + 21x - 1 = 3 + 2x - 10x - 12x

-12 - 5 - 1 = 2x - 10x - 12x - 21x

-17 - 1 = -8x - (-33x)

-18 = -8x + 33x

-18 = 25x

-18/25 = x

x = -0.72

Hope it helps you