For the trinomial to be a perfect square trinomial the coefficient for the x^2 term must. E a perfect square.
Letter C
I believe it's E.) 12.96
12 times 8% equals .96 so $12.96 should be the answer since it wants the final price with tax :DD
10. Infinitely many solutions:

Simplify this equation:

When
the equation becomes

This equality is true for all x, thus the equation has infinitely many solutions.
11. The equation
should have one solution x=-1.
First, simplify the equation:

This equation will have solution x=-1 when

Therefore, the initial equation is

12. The equation
should have infinitely many solutions.
Simplify it:

When
this equation will have infinitely many solutions.