Question

Got stumped on the (7x^2-2) part

Answer 1

7x²-2=0
add 2 to both sides
7x²=2
divide by 7 both sides

`x^2=(2)/(7)`
sqrt both sides

`x=+/-(√(2))/(√(7))`

`x=+/-(√(14))/(7)`



so the possible values of x are

`x=(5)/(2),(-√(14))/(7),(√(14))/(7)`