Question

Helppppp plsssss!!!!!

Answer 1

X^2 + 2x -4= 0

You need to remember one standard result

ax^2 + bx + c= 0

`x = \frac{ - b + - \sqrt{ {b}^(2) - 4ac} }{2a}`

By Comparing the coefficients,

a= 1, b=2, c=-4

`x = \frac{ - 2 + - \sqrt{ {2}^(2) - 4 * 1 * - 4 } }{2 * 1} \\ x = ( - 2 + - √(4 + 16) )/(2) \\ \\ x = ( - 2 + - √(20) )/(2) \\ \\ x = ( - 2 + - 2 √(5) )/(2) \\ \\ x = - 1 + - √(5)`

Options A ,C