This is indeed a polymomial, it's just not in the correct order. The term with the highest exponent goes first, dictating the degree of the whole entire polynomial. In descending order, the polynomial is written correctly as $-2x^3+3x^2-x-9$ . It is a third degree polynomial with a leading coefficient of -2.

3 0

4 years ago

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Factorize the following: 9{p-q}²-25{q-r}²

anyanavicka [17]

Step-by-step explanation:

Using the identity a² - b² = (a + b) (a - b)

=> (3 {p - q})² - (5 {q - r})²

=> [(3 {p - q}) + (5 {q - r})] [(3 {p - q}) - (5 {q - r})]

=> [(3p - 3q) + (5q - 5r)] [(3p - 3q) - (5q - 5r)]

=> [3p - 3q + 5q - 5r] [3p - 3q - 5q + 5r]

=> [3p + 2q - 5r] [3p - 8q + 5r]

6 0

2 years ago