Could you please explain

find an equation for i, -i, -4, 1 = x as its solution

Answer this question! 30 points and brainliest!

What expression is equivalent to (2x-1)(x-3)?

Sanderson is having trouble with his assignment. his shown work is as follows: − 3 7 7 3 = − 3 7 × 7 3 = − 21 21 = −1 however, his answer does not match the answer that his teacher gives him. complete the description of sanderson's mistake. find the correct answer.