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Alexus [3.1K]
3 years ago
7

Help a girl out pls

Mathematics
1 answer:
Marta_Voda [28]3 years ago
3 0

Answer:

    1 ± sqrt(17)

 x = ---------------------------

            2

Step-by-step explanation:

x^2 - x - 4 =0

Using the quadratic equation

     -b ± sqrt(b^2 -4ac)

 x = ---------------------------

            2a

Where ax^2 +bx +c  

We know a =1  b = -1  c = -4

     -(-1) ± sqrt((-1)^2 -4(1)(-4))

 x = ---------------------------

            2(1)

     1 ± sqrt(1 +16)

 x = ---------------------------

            2

     1 ± sqrt(17)

 x = ---------------------------

            2

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