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3 years ago

Please help I don’t understand it

Mathematics

1 answer:

IgorLugansk [536]3 years ago

7 0

Answer:

Step-by-step explanation:

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3 years ago

What is (3x+5)(x^2+6x+11)

serg [7]

Answer:

$\large\boxed{3x^3+23x^2+63x+55}$

Step-by-step explanation:

$\text{Use FOIL:}\\\\(a+b)(c+d)=ac+ad+bc+bd$

$(3x+5)(x^2+6x+11)\\\\=(3x)(x^2)+(3x)(6x)+(3x)(11)+(5)(x^2)+(5)(6x)+(5)(11)\\\\=3x^3+18x^2+33x+5x^2+30x+55\qquad\text{combine like terms}\\\\=3x^3+(18x^2+5x^3)+(33x+30x)+55\\\\=3x^3+23x^2+63x+55$

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4 years ago