[9.05] What are the exact solutions of x2 − 3x − 7 = 0?
Medal to best answer

Question

[9.05] What are the exact solutions of x2 − 3x − 7 = 0?
Medal to best answer

anonymous · Answer

@JackJones

johnweldon1993 · Answer

Have you heard of the quadratic formula?

anonymous · Answer

No I haven't

johnweldon1993 · Answer

Okay...what you have....is an equation

x² - 3x -7 = 0

With 3 coefficients

1x² (1 is the coefficient) 
-3x (-3 is the coefficient) 
and
-7 (7 is the coefficient) 

assign these to letter

1 = a
-3 = b
-7 = c

Use this equation:

$$\frac{ -b \pm \sqrt{b^2 - 4ac} }{ 2a }$$

*hope that shows up...didn't load correctly*

but plug each of those numbers in for the letters they correspond to in that equation.....This will give you 2 answers....understandable?

anonymous · Answer

Thank you for helping me understand!!

johnweldon1993 · Answer

no problem man!