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-2(a + b[3a – a(4 - b)])
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1 Answer

2 votes

Answer: -2ab² + 2ab - 2a

Explanation:

-2(a + b[3a - a(4 - b)])

= -2(a + b[3a - 4a + ab]) distributed -a into (4 - b)

= -2(a + b[-a + ab]) simplified inner brackets

= -2(a - ab + ab²) distributed b into (-a + ab)

= -2a + 2ab - 2ab² distributed -2 into (a - ab + ab²)

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