Question

10a²+4= -186
Very easy quick points

Answer 1

please see explanation

Explanation:

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