Question

(x-2)^3+(3x-1)(3x+1)=(x+1)^3

Answer 1

2x³+9x²=10

Explanation:

x³-8+9x²+3x-3x-1= x³+1

x³+9x²+3x-3x-x³=1+8+1

2x³+9x²=10

Answer 2

`x = (10)/(9)`

Explanation:

`(x-2)^3+(3x-1)(3x+1)=(x+1)^3`

`x^3-6x^2+12x-8+9x^2-1=x^3+3x^2+3x+1`

`x^3+3x^2+12x-9=x^3+3x^2+3x+1`

`x^3+3x^2+12x=x^3+3x^2+3x+10`

`12x=3x+10`

`9x = 10`

`x = (10)/(9)`