Question

if x+3 is a factor of ax²+18=0, then a=?​

Answer 1

Answer:

$x = - 3 \\ ax {}^{2} + 18 = 0 \\ a( - 3) {}^{2} = - 18 \\ 9a = - 18 \\ a = \frac{ - 18}{9} \\ a = - 2 \: answer$

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Answer 2

Answer:

how do you get 60° is my question.

can you give me the answer.

but your answer is right.

i want to know how you got 60°.