Question

which of the following expression is a polynomial,state the reason?if an expression is polynomial,state whether it is a polynomial is one variable or not:
1) x²-15x+50
2) x³+3x²y+3xy²+y³
3) x²+y²+z²+2xy+2yz+2zx
4) 5x²+11x-2√x
5) 3x²+5x-7+8/x
6) √3x²+πx-9​

Answer 1

Answer:

1) polynomial in one variable (variable x)

2) polynomial in 2 variables (variables x and y)

3) polynomial in 3 variables (variables x y and z)

4)not a polynomial

5)not a polynomial

6) polynomial in one variable ( variable x)

Step-by-step explanation:

4th and 5th options are not polynomials because in a polynomial, the power or exponent of variable cannot be negative

in option 4)

power of x in 2✓x is -1

in option 5)

power of x in 8/x is -1

Answer 2

Answer:

Step-by-step explanation: