Question

The expanded form of (3x-5)Power 3

Answer 1

Answer:

Step-by-step explanation:

(a-b)³ = a³-3a²b+3ab²-b³

           

(3x-5)³ = (3x)³ -  3×(3x)²×-5  +  3×3x×(-5)²  - (-5)³

          = 27x³ -  3×9x²×-5  + 3×3x×25  --125

          = 27x³ - - 135x² + 225x + 125

          = 27x³ + 135x² + 225x + 125

Answer 2

Answer:

Step-by-step explanation:

by Identity VII

      (3x-5)^3= (3x)^3-3(3x)^2(-5)+3(3x)(-5)^2-(-5)^3

                   =(27x)^3-3(9x)(-5)+3(3x)(25)-(-125)^3

                   =27x^3-(-135x^2)+225x+125^3

                   =27x^3+135x^2+225x+125^3

∴ 27x^3+135x^2+225x+125^3 is the answer.