Solve: $(3 a - 4 b) (a + 2 b) - 4 (3 a - 4 b) (4 a)$

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Solution

$(3 a - 4 b) (a + 2 b) - 4 (3 a - 4 b) (4 a)$
$(3 a^{2} - 4 a b + 6 a b - 8 b^{2}) - 4 (12 a^{2} - 16 a b)$
$3 a^{2} + 2 a b - 8 b^{2} - 48 a^{2} + 64 a b$
$- 45 a^{2} - 8 b^{2} + 66 a b$ Ans

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Similar questions

3 a^{2} - 4 a b + 6 b^{2} - (3 a^{2} - 8 a b - 2 b^{2})

6 (a x + b y) = 3 a + 2 b

6 (b x - a y) = 3 a - 2 b

a - 2 b = 2

3 a - 2 b = 6

3 a - 2 b = - 10; 2 a + 3 b = 2

(3 a + 4 b) (a - b) = 3 a^{2} - 4 a^{2}

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