Question

Write the expression 7x^10 + 6x^5 + 5 in quadratic form.

Answer 1

For this case we have the following expression:

$7x^{10} + 6x ^ 5 + 5$

We must rewrite it quadratically:

By definition, a quadratic equation is of the form:

$ax ^ 2 + bx + c = 0$

Now, suppose $u = x ^ 5$

Rewriting the given expression with the change of variable we have:

$7u ^ 2 + 6u + 5$

So, we have a quadratic expression.

Returning the change we have:

$7 (x ^ 5) ^ 2 + 6 (x ^ 5) +5$

ANswer:

Option B