princessryan68 princessryan68

09-03-2021
Mathematics

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7b^2 - 14b - 56 = 0
Solve by completing the square

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GreenSoda GreenSoda

09-03-2021

Answer: 7(b-1)^2-63

Step-by-step explanation:

Factor out 7

7(b^2-2b-8)

Add and subtract (-1)^2:

7(b^2-2b-8+(-1)^2-(-1\)^2)

Complete the square:

7((b-1)^2-8-(-1)^2)

Simplify:

7(b-1)^2-63

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