Question

Solve the quadratic equation x2 - 4x + 57 = -5 by completing the square.

Answer 1

Do you know how to do the completing square?

Answer 2

Learn here: https://www.khanacademy.org/math/algebra/quadratics/completing_the_square/v/completing-the-square

Answer 3

Determine the number of solutions of 2x2 + 3x = 0.

Answer 4

For this problem. Do you know how to factor?

Answer 5

if middle term is -4x
and perfect square is like: \[x ^{2} - 2ax + a ^{2}\]
you know that -4x = -2ax then a=2
you need an \[a ^{2}\] added at the end, but you need to add it in both sides of equation
do you got it?