10y=18=3(5y-7)=5y
need on this problem if anyone could me i would be grateful

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.

80x^8−68x^6+16^5−20x^4−4x^3+8x^2

hope i'm right lol