A teacher tells the class that (x - a) is a factor of x^3 - 19x - 30, where a is a positive whole number less than 10. By testing factors of 30, find the positive value of a that works.

Question

Accepted Answer

5. Possible roots divide 30. Test x = 5: 125 - 95 - 30 = 0. So a = 5, and (x - 5) is a factor.

A teacher tells the class that $(x - a)$ is a factor of $x^{3} - 19 x - 30$ , where a is a positive whole number less than 10.
By testing factors of 30, find the positive value of a that works.

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 9 Factor Theorem and Factorisation practice

A teacher tells the class that (x−a) is a factor of x3−19x−30, where a is a positive whole number less than 10.By testing factors of 30, find the positive value of a that works.

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 9 Factor Theorem and Factorisation practice

A teacher tells the class that $(x - a)$ is a factor of $x^{3} - 19 x - 30$ , where a is a positive whole number less than 10.
By testing factors of 30, find the positive value of a that works.