Question

(ii) (x + 7)2 = x2 + 14x + k হলেk-এর মান কত?​

Answer 1

Answer:

Hi, I hope this helps you.

Answer 2

$Given \: (x+7)^{2} = x^{2} + 14x + k$

/* By algebraic identity */

$\boxed{\pink{ (a+b)^{2} = a^{2} + 2ab + b^{2}}}$

$\implies x^{2} + 2 \times x \times 7 + 7^{2} = x^{2} + 14x + k$

$\implies x^{2} + 14x + 49 = x^{2} + 14x + k$

/* Compare bothsides , we get */

$k = 49$

Therefore.,

$\red{ Value \:of \: k }\green { = 49}$

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