Question

Step by step explanation
How that k2 +2k +1 became (k+1)2
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Answer 1

Answer:

Step-by-step explanation:

k²+2k+1 is the whole square of (k+1)

=k² +k + k+1

=k(k+1)+1(k+1)

=(k+1)(k+1)

=(k+1)²

k²+2k+1 = (k+1)²

Answer 2

Answer:

$= \frac{2 {(k + 1}^{2} }{(k + 1)(k + 2)} \\ = \frac{2.(k + 1)}{(k + 2)} \\ k + 2 = 2.(k + 1) \\ k + 2 = 2k + 2 \\ 2k - k = 2 - 2 \\ k = 0$

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