Combine and write in standard form. 2x(3x2 + 8x – 4) – 3(2x2 + x – 5)

6x^3 +10x^2 -11x +15

Step-by-step explanation:

2x(3x2 + 8x – 4) – 3(2x2 + x – 5)

Distribute

6x^3 + 16x^2-8x -6x^2 -3x+15

Combine like terms

6x^3 + 16x^2 -6x^2 -3x-8x+15

6x^3 +10x^2 -11x +15

Standard form is from highest to lowest power

6x^3 +10x^2 -11x +15

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.

step-by-step explanation: