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 Start
Root 33 EndRoot x = 2 plus-or-minus StartRoot 34 EndRoot x = 4 plus-or-minus StartRoot 42 EndRoot
2 answers:
Answer:
the answer is A on edg2020
Step-by-step explanation:
Answer:
<u>The correct answer is A. x = 2 +/- √42</u>
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
<u>The correct answer is A. x = 2 +/- √42</u>
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