Question

3x(3x^2+1)-(x-3)(x+3)-5x

Answer 1

Если что-то не понятно, спрашивайте)

Answer 2

3x( $3x^{2}$ + 1) -  $x^{2}$ -  $3^{2}$ - 5x
$9x^{3}$ + 3x - $x^{2}$ - 9 - 5x
$9x^{3}$ - 2x - $x^{2}$ - 9
$9x^{3}$ - $x^{2}$ - 2x - 9

А дальше по дискриминанту.

Answer 3

To simplify the expression 3x(3x^2+1)-(x-3)(x+3)-5x, follow these steps:

1. Distribute the 3x into the first term inside the parentheses: 3x * 3x^2 = 9x^3 3x * 1 = 3x

   So, the expression becomes: 9x^3 + 3x - (x-3)(x+3) - 5x

2. Expand the second term inside the parentheses using the distributive property: (x-3)(x+3) = xx + x3 - 3x - 33 = x^2 + 3x - 3x - 9

   So, the expression becomes: 9x^3 + 3x - (x^2 + 3x - 3x - 9) - 5x

3. Now, simplify the expression further by combining like terms: 9x^3 + 3x - x^2 - 3x + 3x + 9 - 5x

4. Combine like terms: 9x^3 - x^2 + 9

So, the simplified expression is: 9x^3 - x^2 + 9