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How do you solve x2 = 16 using the quadratic formula

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Detailed Solution

⇒ x2 = 16
⇒ x2 – 16 = 0 …(i)
It lan be written. x2 – 16 + 0x = 0
Now
a = 1, b = 0, c = –16
Quadratic formula

x = − b ± b 2 − 4 a c 2 a

x = 0 ± (0) 2 − 4 (1) (− 16) 2 × 1

= 4 × 4 × 4 2 ⇒ ± 82

x = ± 4
x = 4, x = –4

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