Solve for x in the equation x squared minus 4 x minus 9 = 29. x = 2 plus-or-minus StartRoot 42 EndRoot x = 2 plus-or-minus StartRoot 33 EndRoot x = 2 plus-or-minus StartRoot 34 EndRoot x = 4 plus-or-minus StartRoot 42 EndRoot

the answer is A on edg2020

The correct answer is A. x = 2 + / - √42

Step-by-step explanation:

Let's solve for x the quadratic equation, this way:

x² - 4x - 9 = 29

x² - 4x - 38 = 0

Using the quadratic formula, we have:

x = [ - (-4) + / - √ - 4² - 4 * - 38]/2

x = 4 + / - √ 16 + 152/2

x = 4 + / - √ 168/2

x = 4 + / - √ 4 * 42/2

x = 4 + / - 2 √42/2

x = 2 + / - √42

The correct answer is A. x = 2 + / - √42