3 years ago

Solve x2 – 8x = 20 by completing the square. Which is the solution set of the equation?

Mathematics

1 answer:

Scorpion4ik [409]3 years ago

5 0

Answer:

Step-by-step explanation:

x² – 8x = 20 ⇌ x² – 2(4)x = 4 + 16 ⇌ x² – 2(4)x - 16 = 4 ⇌ (x - 4)² = 4

⇌ x - 4 = 2 or x - 4 = -2 ⇌ x = 6 or x = 2

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