solve it . p(x)=2x³+x²-5x+2 , 1/2 , 1 ,-2
Answers
Answer:
its easy!!!!!!!!!!!!!!!!
Answer:
2x³ - x² - 5x + 2
x = , 1, - 2
Whenever you receive such questions which says - "to solve" it means that, we've to substitute thw given values of x in the place of x in the given equation. After substituting, if the equation is equal to zero, then that number is the zero of that polynomial.
1. Substituting x = in 2x³ - x² - 5x + 2
But we know that, can never be equal to 0.
Therefore, is not the zero of the given polynomial.
2. Substituting x = 1 in the given polynomial 2x³ - x² - 5x + 2.
2(1)³ - (1)² - 5(1) + 2 = 0
2(1) - (1) - 5 + 2 = 0
2 - 1 - 5 + 2 = 0
1 - 3 = 0
- 2 = 0
But we know that, - 2 never can be equal to zero.
Therefore, 1 is not the zero of the given polynomial.
3. Substituting x = - 2 in given equation 2x³ - x² - 5x + 2.
2(-2)³ - (-2)² - 5(-2) + 2 = 0
2(-8) - (4) + 10 + 2 = 0
-16 - 4 + 10 + 2 = 0
-20 + 12 = 0
- 8 = 0
But we know that, - 8 can never be equal to zero. Therefore, - 2 is not a zero of the given equation.
Therefore, , 1 and - 2 are not the zeros of the given polynomial 2x³-x²-5x+2.