233k views
4 votes
If (x-2) 2= 49, then x could be

A. -9

B. -7

C.- 2

D. 5

E.9

2 Answers

3 votes

Answer:

(x - 2)^2 = 49

x - 2 = ± 7

x = 2 ± 7

x = 9 ∨ x = -5

Answer E is correct.


User Robbie Hanson
by
5.5k points
3 votes

Hey there!

Assuming you meant:
\bold{(x-2)^2=49}

If so, then follow these steps

  1. Firstly, lets
    \bold{subtract} by the number
    \bold{49} on each of the sides that you're working with

  • \bold{x^2-4x+4-4-49}
    \bold{=49-49}

  • \bold{Cancel: 49-49} because it gives you the result of
    \bold{0}

  • \bold{Keep: 4-49} because it helps us solve for our answer

  • \bold{We}
    \bold{get:}
    \bold{x^2-4x-45=0}

2.
\bold{Factor} out the left side of your equation


  • \bold{(x+5)(x-9)=0}

3.
\bold{Set} the numbers to the number
\bold{0}


  • \bold{x+5=0}

  • \bold{x-9=0}
  • First one:
    \bold{x=-5}
  • Second one:
    \bold{x=9}
  • Since you don't have any options of
    \bold{x=-5} we can't use that one an
    \bold{x-value}

So,
\boxed{\boxed{\bold{Answer: E.)x=9}}}

Good luck on your assignment and enjoy your day!

~
\bold{LoveYourselfFirst:)}

User Katie M
by
5.4k points
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