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Fiesta28 [93]
2 years ago
5

10a²+4= -186 Very easy quick points

Mathematics
1 answer:
OlgaM077 [116]2 years ago
5 0

Answer:

please see explanation

Step-by-step explanation:

10a {}^{2}  + 4 =  - 186 \\ 10a {}^{2}  =  - 186 - 4 \\ 10a {}^{2}  =  - 190 \\ divide \: bothsides \: by \: 10 \\  \frac{10a {}^{2} }{10}  =   \frac{ - 190}{10}  \\ a { }^{2}  =  - 19 \\ square \: root \: bothsides \\    \sqrt{a {}^{2} }  =    \sqrt{ - 19}   \\ a =  - 1 \sqrt{19 }  \\ a =   + i \sqrt{19}  \: or \: a =  - i \sqrt{19}

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