Question

Consider this quadratic equation. 2x2 − 1 = 3x + 4 Which equation correctly applies the quadratic formula?

Answer 1

`(-(-3)+-√((-3)^2-4(2)(-5)))/(2(2))`

Explanation:

Quadratic formula:
`(-b+-√(b^2-4ac) )/(2a)`

`2x^2-1=3x+4\\\\2x^2-3x-5=0\\\\\\frac{-(-3)+-√((-3)^2-4(2)(-5))}{2(2)} \\(3+-√(9+40) )/(4)`

`x = (3+-7)/(4)`

Hope this helps and God bless!