Gujarat BoardEnglish MediumSTD 8MATHSFactorization1 Mark
MCQ
The factorisation of $12a^2b + 15ab^2$ gives:
A
$3ab(4ab + 5)$
✓
$3ab(4a + 5b)$
C
$3a(4a + 5b)$
D
$3b(4a + 5b)$
✓
Answer
Correct option: B.
$3ab(4a + 5b)$
B. $3ab(4a + 5b)$ Solution:
$12 a^2 b+15 a b^2 $
$12 a^2 b=3 \times 4 \times a \times a \times b $
$15 a b^2=3 \times 5 \times a \times b \times b$
The common factors are 3ab.
$12 a^2 b+15 a b^2=3 a b(4 a+5 b)$
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