Question:
Factorise:
x2 + 14x + 49
Solution:
We have:
$x^{2}+14 x+49=x^{2}+2 \times x \times 7+(7)^{2}$
$=(x+7)^{2}$
$\therefore x^{2}+14 x+49=(x+7)^{2}$
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