Answer:
D. 3x^4 - 10x^2 + 6
Explanation:
Let's work our way from the front of the equation to the back.
x^2 x 3x^2
to make this easier we are gonna separate the exponent and deal with that after.
x x 3x
Well that is basically 1 x 3 so that is 3. So we can easily cross out A.
Now we can deal with the exponents. When the equations are multiplying, we are gonna add the exponents.
2 + 2 = 4.
Okay, now let's deal with -5x and 2x
-5x x 2x
Easy, just multiply the numbers while adding the exponents like we did before.
-10x^2
And if you look at the 3 remaining answers
Only D. starts off with 3x^4 -10x^2
So eliminating the rest, now you are left it D as the answer