Janae wrote the following polynomial expression: 2x5 - 4x3 + 6x8.
Janae claimed it was a trinomial with a leading coefficient of 2.
Justin argued back claiming that it was a trinomial with a leading
coefficient of 6. Who is correct? Explain.

Justin is correct

Step-by-step explanation:

2x^5 - 4x^3 + 6x^8.

We need to rewrite the polynomial in decreasing order

6x^8 +2x^5 -4x^3

The leading coefficient is 6

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

answer: you need the equation in the question so i can answer it

step-by-step explanation: