For this case we have the following expression:
[tex]7x^{10} + 6x ^ 5 + 5[/tex]
We must rewrite it quadratically:
By definition, a quadratic equation is of the form:
[tex]ax ^ 2 + bx + c = 0[/tex]
Now, suppose [tex]u = x ^ 5[/tex]
Rewriting the given expression with the change of variable we have:
[tex]7u ^ 2 + 6u + 5[/tex]
So, we have a quadratic expression.
Returning the change we have:
[tex]7 (x ^ 5) ^ 2 + 6 (x ^ 5) +5[/tex]
ANswer:
Option B
