A^4-18a^2-16=0plz slove this quadratic equation??

1.	A^4-18a^2-16=0plz slove this quadratic equation??
Answer» Answer: a^4-18a^2-16=0 d=260=b^2-4ac a^2=(18+ $\sqrt{388}$ )/2 or a^2=(18- $\sqrt{388}$ )/2 this would be rejected as a SQ cannot be negative thus a= root of (18+ $\sqrt{388}$ )/2

Answer»

Answer:

a^4-18a^2-16=0

d=260=b^2-4ac

a^2=(18+ $\sqrt{388}$ )/2 or a^2=(18- $\sqrt{388}$ )/2 this would be rejected as a SQ cannot be negative

thus a= root of (18+ $\sqrt{388}$ )/2

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A^4-18a^2-16=0plz slove this quadratic equation??​

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A^4-18a^2-16=0plz slove this quadratic equation??