Question

how do you solve this equation by completing the square2x² + 16x - 11 = -7
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Answer 1

Answer:

• x = -4 ± 3√2

Step-by-step explanation:

See the steps

• 2x² + 16x - 11 = -7
• 2(x² + 8x) = 4
• x² + 8x = 2
• x² + 8x + 16 - 16= 2
• (x² + 8x + 16) = 16 + 2
• (x + 4)² = 18
• x + 4 = ± 3√2
• x = -4 ± 3√2