Question:
Factorise:
x2 + 8x + 16
Solution:
We have:
$x^{2}+8 x+16=x^{2}+2 \times x \times 4+(4)^{2}$
$=(x+4)^{2}$
$\therefore x^{2}+8 x+16=(x+4)^{2}$
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