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allyza_obico

  • 4 years ago

use the foil method (3a+4b)(5a+b)

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  1. angela210793
    • 4 years ago
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    3a*5a+3a*b+4b*5a+4b*b=15a^2+3ab+20ab+4b^2=15a^2+23ab+4b^2

  2. radar
    • 4 years ago
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    First, Outer, Inner, Last = FOIL First: 3a 5a=15a^2 Outer: 3a b = 3ab Inner: 4b 5= 20b last: 4b b= 4b^2 Now combine: \[15a ^{2}+3ab+20b+4b ^{2}\]

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