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mr_godi [17]
2 years ago
10

Helppppppppp please

Mathematics
1 answer:
IrinaK [193]2 years ago
4 0

Answer:

A, C

Step-by-step explanation:

Quadratic formula:

x =  \frac{ - b± \sqrt{b^{2} - 4ac } }{2a}

a is the coefficient of x², b is the coefficient of x and c is the constant when a second degree polynomial is equal to zero. (ax² +bx +c= 0)

x² +5x +11= 0

a= 1, b= 5, c=11

Thus, using the quadratic formula:

x =  \frac{ - 5± \sqrt{ {5}^{2}  - 4(1)(11)} }{2(1)}  \\ x =  \frac{ - 5± \sqrt{25 - 44} }{2}  \\ x =  \frac{ - 5± \sqrt{ - 19} }{2}

∴The answers are A and C.

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\boxed{a.\:\:\:60\degree}

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