Answer:
Last option is correct.
Step-by-step explanation:
We are given with some polynomials.
We have to tell which one is in standard form of polynomial.
In Standard Form of a polynomial , Terms are arranged in decreasing or descending order of degree of the terms.
Polynomial 1.
1 + 2x - 8x² + 6x³
In this Terms are arranged in Increasing order of degree of terms.
This is not in Standard form.
Polynomial 2.
2x² + 6x³ - 9x + 12
In this polynomial first two terms are arranged in Increasing order of degree while last two arranged in decreasing order of degree.
This is not in Standard form.
Polynomial 3.
6x³ + 5x - 3x² + 2
In this Terms are arranged in jumbled order of degree
This is not in Standard form.
Polynomial 4.
2x³ + 4x² - 7x + 5
In this Terms are arranged in Decreasing order of degree of terms.
This is in Standard form.
Therefore, Last option is correct.
