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OpenStudy (anonymous):
Simplify: (4a – 2b)(a + b)
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OpenStudy (anonymous):
i believe you use FOIL...
OpenStudy (anonymous):
(4a-2b)(a+b) =(4a*a + 4a*b + (-2b)*a + (-2b)*b) =(4a² + 4ab - 2ba -2b²) =4a² + 2ab - b²
jimthompson5910 (jim_thompson5910):
you can also use this rectangle |dw:1404341176799:dw|
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