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Paraphin [41]
3 years ago
15

Six books are to be placed in a 3-tier triangular shelf. How many ways can this be done if the top teir can hold one book, the s

econd tier can hold two books, the third teir can hold three books. (topic: permutation and combination) ​
Mathematics
1 answer:
lawyer [7]3 years ago
5 0

Answer:

you still need answerrrr

Step-by-step explanation:

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Perform the indicated operation and simplify. (x+3)(x2−5x+2) Write your answer in standard form. No spaces when entering your an
Deffense [45]

Answer:

x^3-2x^2-13x+6

Step-by-step explanation:

We are to simplify the expression (x+3)(x^2−5x+2). This is as shown;

(x+3)(x^2−5x+2)

Expand

= x(x^2)-5x(x)+2x+3x^2-3(5x)+6

= x^3 - 5x^2+2x+3x^2-15x+6

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= x^3 - 5x^2+3x^2+2x-15x=6

= x^3-2x^2-13x+6

This gives the required expression

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