3 years ago

Help a girl out pls

Mathematics

1 answer:

Marta_Voda [28]3 years ago

3 0

Answer:

1 ± sqrt(17)

x = ---------------------------

Step-by-step explanation:

x^2 - x - 4 =0

Using the quadratic equation

-b ± sqrt(b^2 -4ac)

x = ---------------------------

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 = ---------------------------

1 ± sqrt(17)

x = ---------------------------

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