3 years ago

Please help! i posted picture of question

Mathematics

2 answers:

julsineya [31]3 years ago

7 0

I believe it is the last answer

n200080 [17]3 years ago

5 0

I would go with option C. x, in the first equation.

The X term has a coefficient of 3, the lowest common factor amongst the 3 terms making for easy isolation of the variable.

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3 years ago

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

serg [7]

Answer:

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

Step-by-step explanation:

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

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