Question

solve equation by taking square roots:
k^2+76
how do i do that?

Answer 1

This is not an equation. In equations, there must be an equality sign.

Answer 2

the plus was supposed to be =, sorrry.
k^2=76

Answer 3

if the plus sign was an equals sign:
the square root of k^2 is k. so k= sqrt of 76. which is 8.717797887....

Answer 4

But if you're asking about \(k^2+76=0\) then it has no real solution.

Answer 5

OK then, NK got the answer for you :D.

Answer 6

\[k^2=76 \implies k=-\sqrt{76}, k=\sqrt{76}\]

Answer 7

So two solutions.

Answer 8

so how would you get the answer for k^2=16? ...

Answer 9

K can have two values; \(k=4\) or \(k=-4\)

Answer 10

do you just find the square root of the last number?

Answer 11

Yep, and take both positive and negative values.

Answer 12

so x2=21
is 4.58....
or no?
:(

Answer 13

Exactly \(x=4.58\) or \(x=-4.58\) :)