Right equation of this question
3-4√7 please help​

Could someone with number 1 and 2

Let x = a + bi and y = c + di and z = f + gi. which statements are true?

20 points plus brainliest andwer plus my hover hoard im v desperate ! evaluate the polynomial for x=-2 in the equation -3x^3+7x^2-7x-1 (simplify your answer)