12a^2b^2×3ab^2×( 2a^2b)=( 12)*3*( 2)*a^2b^2*ab^2*a^2b=72*a^2+1+2b^2+2+1=72a^5b^5 ...

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Expansion of (a ± b ± c)²

-12a2b2×3ab2×...

Question

$- 12 a^{2} b^{2} \times 3 a b^{2} \times (- 2 a^{2} b)$

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Solution

$- 12 a^{2} b^{2} \times 3 a b^{2} \times (- 2 a^{2} b) = (- 12) * 3 * (- 2) * a^{2} b^{2} * a b^{2} * a^{2} b = 72 * a^{2 + 1 + 2} b^{2 + 2 + 1} = 72 a^{5} b^{5}$

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