Question

Can you explain it and help me out please​

Answer 1

The answer would be c on this

Answer 2

c.

Explanation:

2x² - 4x - 3 = 0

`x= \frac{-b+/-\sqrt{b^(2)-4ac} }{2a} \\\\x= \frac{-(-4)+/-\sqrt{(-4)^(2)-4*2*(-3)} }{2*2} \\\\x= (4+/-√(16+24) )/(4) \\\\x= (4+/-√(40) )/(4) = (4+/-2√(10) )/(4)=(2+/-√(10) )/(2)`