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Anon25 [30]
3 years ago
6

What number must be added to the expression below to complete the square x^2+8x-5=15

Mathematics
1 answer:
Rasek [7]3 years ago
5 0

Answer:

Add 16 to both sides.

General Formulas and Concepts:

<u>Pre-Alg</u>

  • Equality Properties

<u>Algebra I</u>

  • Completing the Square: b/2a

Step-by-step explanation:

<u>Step 1: Define expression</u>

x² + 8x - 5 = 15

<u>Step 2: Solve</u>

  1. Isolate <em>x</em> terms:                    x² + 8x = 20
  2. Complete the Square:        (x² + 8x + 16) = 20 + 16
  3. Simplify:                               (x + 4)² = 36
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