Verify Answer on Using Square Root

[Guest]

2x^2 = 40

2x = +/- SQRT 40

x = +/- 1/2 SQRT 40

x = +/- SQRT 40 /2

x = +/- SQRT 8*5 /2

x = +/- SQRT 8 SQRT 5 / 2

Answer x = +/- 2 SQRT 5 /2

 

[pka]

It would be best to first divide by 2.
Then x<SUP>2</SUP>=20.

 

[Guest]

Is this right now

2x^2 = 40

x^2 = 20

x = SQRT 20

x = +/- SQRT 5 SQRT 4

x = +/- 2 SQRT 5

maybe this right