Question

a) x2 + 6x + 8 by completion of squares
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Answer 1

Answer:

Is your question 2x + 6x + 8?

If so, then...

2x + 6x +8

8x + 8

So, 8x is your answer.

Hope it helps! :)

And sorry if my answer was wrong, I couldn't quite understand your question...

Answer 2

${x}^{2} + 6x + 8 \\ = {x}^{2} + 4x + 2x + 8 \\ = x(x + 4) + 2(x + 4) \\ = (x + 4)(x + 2)$