Question

What is the prime factorization of the polynomials below?


1.x^2+10x+21 2. X^2-2x-15

Answer 1

\(\Large\color{black}{ \bf x^{2}+10x+21=(x+\text{__})(x+\text{__}) }\)


\(\Large\color{black}{ \bf x^{2}-2x-15=(x-\text{__})(x+\text{__}) }\)


can you fill in the blanks ?

Answer 2

5 and 2?

Answer 3

For which one, the first ?

Answer 4

they numbers to fill in the blanks, are factors of the last number in the polynomial, in other words, the factors of the LAST term, NOT the factors of the SECOND term.

Answer 5

thanx :D