TBQ - Expand the given expression — task. Maths CBSE Live product, Class 8.

Answer variants:
$7 a + 21 ab + b a^{2} - b - 3 b^{2}$
$7 a + 8 ab + a b^{2} - 21 b^{3}$
$7 a + 8 ab + a b^{2} - 21 b^{2} - 3 b^{3}$

Expand $(a + ab – 3b^{2}) (7 + b)$.

Answer:

$a + ab – 3b^{2}$ is a .

$7 + b$ is a .

The resultant product of these two expression will contain terms.

$(a + ab – 3b^{2}) (7 + b)$ $=$

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2. TBQ - Expand the given expression