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yan [13]
3 years ago
15

Solve the following equation and show all of your steps: x^2+x−1=0

Mathematics
1 answer:
DaniilM [7]3 years ago
5 0
Quadratic formula since this trinomial is not factorable.
\frac{ - b +  -  \sqrt{ {b}^{2} - 4ac } }{2a}  \\  \frac{ - 1 +  -  \sqrt{ {(1)}^{2} - 4(1)( - 1) } }{2(1)}  \\  \frac{ - 1 +  -  \sqrt{1 + 5} }{2}  \\  \frac{ - 1 +  -  \sqrt{6} }{2}  \\ x =   \frac{ - 1 +  \sqrt{6} }{2}  \\ x =   \frac{ - 1 -  \sqrt{6} }{2}
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dem82 [27]

Answer:

3x - 4y = -4

Step-by-step explanation:

substitute the ordered pair into each equation and ensure that it comes out to be true.

8 0
3 years ago
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Natasha_Volkova [10]

Answer:

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Step-by-step explanation:

Percentage increase for any change is calculated by formula

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Given

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7 0
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Step-by-step explanation:

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4 0
2 years ago
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blsea [12.9K]

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6 0
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