Question

Given the equation below, which of the following shows the quadratic formula

correctly applied?
2x² -9x+4 =0

Answer 1

Explanation:

`x=(-(-9)\pm√((-9)^2-4(2)(4)) )/(2 * 2) \\x=(9\pm√(81-32) )/(4) \\x=(9\pm√(49) )/(4) \\x=(9 \pm 7)/(4) \\either~x=(9+7)/(4) =(16)/(4) =4\\or\\x=(9-7)/(4) =(2)/(4) =(1)/(2)`