Question

(x+2)(x-2)(x+3)-(2x-5)² ≤ 2(1-5x²)+(x+3)²(x+3)

z góry dziękuje ;*

Answer 1

(x+2)(x-2)(x+3)-(2x-5)² ≤ 2(1-5x²)+(x+3)²(x+3)

x² - 2x + x² +3x + 2x - 4 + 2x + 6 - 4x² - 20x + 25 ≤ 2 - 10x² + (x² +6x + 9)(x+3)

x² - 2x + x² + 3x + 2x - 4 + 2x + 6 - 4x² - 20x + 25 ≤ 2 - 10x² + x^3 + 3x² + 6x² + 18x + 9x + 27

x² - 2x + x² + 3x + 2x + 2x - 4x² - 20x + 10x² - x^3 - 3x² - 6x² - 18x - 9x ≤ 2 +27 + 4 - 6 - 25

-x² - 32x - x^3 ≤ 2

^ - potęga