Question

What is 8x squared = 56 rounded to the nearest tenth equal?

Answer 1

8x^2=56
divide noth sides by 8
x^2=7
square root both sides
x=2.65 or -2.65

Answer 2

`8x^2=56\ /:8\\x^2=7\\x^2-7=0\\(x- √(7) )(x+ √(7) )=0\\x-√(7)=0\ \ \ \ \ or\ \ \ \ \ x+√(7)=0\\x=√(7)\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ x=-√(7)\\ \\ x\approx2.65\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ x-\approx2.65`