Answer:
The value of x for given expression is x = ± 2. 23 and - 1 .33
Step-by-step explanation:
Given expression as :
3x³ + 4x² - 15x - 20 = 0
Or, 3x³ - 15x + 4x² - 20 = 0
Or, 3x (x² - 5) + 4 (x² - 5 ) = 0
Or, (x² - 5 ) (3x + 4) = 0
Or, (x² - 5) = 0 And (3x + 4) = 0
∴ x = ±√5 = ± 2.23 And x = [tex]\frac{-4}{3}[/tex] = - 1.33
Hence the value of x for given expression is x = ± 2. 23 and - 1 .33 Answer
