Why do we multiply equations by -1? for example, if you need to re-arrange 2x + y = 3 into the form of (y=mx+ i got y = 3 - 2x but the answer is 2x - 3 (it is multiplied by one.)

The thing is you need to get the equation equal to y so you need to add or substrate any number that is with y.but I don't think that's right.because I got this.

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.

sorry man i accidentally pressed yes my bad

step-by-step explanation: