MCQ
The factorisation of $am^2 + bm^2 + bn^2 + an^2$ is:
- A$(a + b) (m^2 - n^2)$
- ✓$(a + b) (m^2 + n^2)$
- C$(a - b) (m^2 + n^2)$
- D$(a - b) (m^2 - n^2)$
✓
Answer
Correct option: B.
$(a + b) (m^2 + n^2)$
B. $(a + b) (m^2 + n^2)$
Solution:
$= am^2 + bm^2 + bn^2 + an^2$
$= m^2(a + b) + n^2(b + a)$
$= (a + b) (m^2 + n^2)$
Solution:
$= am^2 + bm^2 + bn^2 + an^2$
$= m^2(a + b) + n^2(b + a)$
$= (a + b) (m^2 + n^2)$
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