Question

If x^2 = 10, what is the value of x?

±square root of 10
±square root of 20
±5
±20

Answer 1

www.montereyinstitute.org/courses/DevelopmentalMath/COURSE_TEXT2_RESOURCE/U16_L5_T1_text_final.html im not sure if this will help but its the best I can do

Answer 2

Similar Example:
\[\Large x^2 = 70\]
\[\Large \sqrt{x^2} = \sqrt{70}\]
\[\Large |x| = \sqrt{70}\]
\[\Large x = \pm\sqrt{70}\]

Notes:

For step 2, apply the square root to both sides. This will undo the squaring done to the 'x'

For step 3, use the rule \(\Large \sqrt{x^2} = |x|\) where x is any real number

For step 4, use the rule that if |x| = k, then x = -k or x = k where k is some positive number.

Answer 3

thnx