I got
x^3+125
but my teacher says its wrong and I dont understand what I did to get the wrong answer?
Multiply the binomial and the trinomial: (x – 5)(x
2 + 5x + 25
step by step
6 answers
First, for any kind of help, you need clarify your trinomial expression. This x something. Is that + or minus the next part?
OH SORRY
its (x – 5)(x2 + 5x + 25)
its (x – 5)(x2 + 5x + 25)
recall that a^3-b^3 = (a-b)(a^2+ab+b^2)
so, your answer should be x^3 - 5^3
so, your answer should be x^3 - 5^3
(x-5)(x^2+5x+25).
1. Multiply the 1st term of the 1st parenthesis by each term of trinomial.
2. Multiply 2nd term of 1st parenthesis by each term of trinomial.
3. Combine like-terms.
x^3+5x^2+25x - 5x^2-25x-125 = x^3-125.
1. Multiply the 1st term of the 1st parenthesis by each term of trinomial.
2. Multiply 2nd term of 1st parenthesis by each term of trinomial.
3. Combine like-terms.
x^3+5x^2+25x - 5x^2-25x-125 = x^3-125.
(x+5)(x+2)
2 answers