Question

Abby used the quadratic formula to find the zeros of the

function below. However, Abby made a mistake. What mistake
did Abby make? *

Answer 1

step 2

Explanation:

(-6)^2 ≠ 36^2

(-6)^2 = 36

Answer 2

Step 2: She did not simplify under the square root correctly

under the square root:

(-6)^2 =36

and -4(5)(-8) =160

therefore under the square root it needs to be square root of 36+160 which is square root of 196.

That answer is 14 when square rooted