(-5 - square root of -7)^2

(-5-sqrt(-7))^2 = 25 + 5sqrt(-7) -7 = 18 + 5sqrt(-7)

..................................

is that 5sqrtoot-7?

i got 10 times the sqr root of -7 ... ?

Yes, the right is 10sqrt(-7). I'm sorry, just did mistake.

18 + 10sqrt(-7)

it's ok, so is it 18+10SR-7

yes

or 18+10i SR 7

18+10i SR 7 also can be applied.

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