3 years ago

X^2+18=0 solve please

Mathematics

1 answer:

diamong [38]3 years ago

3 0

9514 1404 393

Answer:

x = ±3√2i

Step-by-step explanation:

Add -18 to both sides of the equation:

x^2 = -18

Take the square root of both sides:

x = ±√(-18)

Remember that 18=9·2 = (3^2)·2 and √-1 = i. Simplify.

x = ±(√(3^2))·(√2)·(√-1)

x = ±3√2i

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