MCQ
Factors of $x^2-4 x y+4 y^2$ are
- A$(x-2 y)(x+2 y)$
- ✓$(x-2 y)(x-2 y)$
- C$(x+2 y)(x+2 y)$
- Dnone of these
✓
Answer
Correct option: B.
$(x-2 y)(x-2 y)$
$x^2-4 x y+4 y^2$
$=(x)^2-2 \times x \times 2 y+(2 y)^2=(x-2 y)^2$
$=(x-2 y)(x-2 y) $
$=(x)^2-2 \times x \times 2 y+(2 y)^2=(x-2 y)^2$
$=(x-2 y)(x-2 y) $
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