anonymous
  • anonymous
Solve 2x2 = 72. A.{±18} B.{±36} C.{±6} D.{±8}
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
anonymous
  • anonymous
anonymous
  • anonymous

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anonymous
  • anonymous
anonymous
  • anonymous
Nnesha
  • Nnesha
first solve for x^2 move 2 to the right side
anonymous
  • anonymous
ok
Nnesha
  • Nnesha
let me know what you get after that
anonymous
  • anonymous
ok hld on
anonymous
  • anonymous
ok so are we moving 2 this way 72*2x?
Nnesha
  • Nnesha
2 is multiplying with x^2 so to cancel 2 from left side you should divide 2 both sides
anonymous
  • anonymous
1*36
anonymous
  • anonymous
so its B
Nnesha
  • Nnesha
how ?
Nnesha
  • Nnesha
x^2 =36 not x
anonymous
  • anonymous
well 2/72=36 then 2/2=1*36=36
Nnesha
  • Nnesha
yes right so x^2 =36 now to cancel out 2 take square root both sides
anonymous
  • anonymous
that would be 72 square root 36 by 2
Nnesha
  • Nnesha
nope |dw:1437429583966:dw| 72/2 is 36 so then there isn't any 72 to take square root of 72
anonymous
  • anonymous
ok thanks
Nnesha
  • Nnesha
so what did you get ?
anonymous
  • anonymous
idk yet
Nnesha
  • Nnesha
already take square root both sides let me know what you get

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