Question

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Answer 1

so u need help in evaluating (-3i\(\sqrt2\))^2
right ?

Answer 2

yes

Answer 3

i dont understand what this question means by if its a solution....

Answer 4

u know what is i^2 = ?

Answer 5

its -1

Answer 6

yes,
so
\((-3i\sqrt2)^2 = (-3)^2i^2(\sqrt2)^2= ??\)

Answer 7

(9)(-1)(2)

Answer 8

thats correct, which equals ?

Answer 9

-18

Answer 10

so what do i do next...?

Answer 11

so -18 + 18 does come out to be 0, right.
wait, i'll tell you what 'a solution' means...

Answer 12

ohhh!!! makes sense!!! thank you so much!!

Answer 13

if 'a' is the solution of f(x)=0
then if we put a instead of x, that is f(a) should also come out to be 0.
got this ?

Answer 14

yess! i got it thank you! i might have some troubles again so i might post some questions up if i get stuck!! haha but thank you so much!

Answer 15

welcome ^_^