Question

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

Answer 1

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

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