Question

The steps to derive the quadratic formula are shown below:

Step 1: ax2 + bx + c = 0
Step 2: x2 + b over ax + c over a = 0
Step 3: x2 + b over ax = - c over a
Step 4: x2 +b over a x + square of quantity of b over 2 times a = - c over a + square of quantity of b over 2 times a
Step 5: x plus b over 4a, all square = - c over a+ square of quantity of b over 2 times a
Step 6: x + b over 2 times a = square root of all of negative c over a plus the square of the quantity b over 2 times a
Step 7: x = - b over 2 times a± square root of all of negative c over a plus the square of the quantity

Answer 1

Which of the following statements best describes the first incorrect step?

In Step 4, square of quantity of b over 2 times a instead of b over 2 times a was added on both sides.

In Step 5, x plus b over 4a, all square was written instead of x plus b over 2a, all square.

In Step 6, square of quantity of b over 2 times a was written instead of b over 2 times a inside the root.

In Step 7, -c over a was written instead of c over a inside the root.

Answer 2

what was it?

Answer 3

@anime