Solve 6x^(2) -42=0 find the exact values of x

Question

Solve
`6x^(2) -42=0` find the exact values of x

Answer 1

`6x^2-42=0\implies 6x^2=42\implies x^2=\cfrac{42}{6}\implies x^2=7 \\\\\\ x=\pm√(7)\implies x\approx \pm 2.65`