Question

Evaluate the expression y=-4y^2 + 6y+9by th way that's y to the power of 2

Answer 1

we have the following:

$y^2+6y+9$

replacing, y = -4

$\begin{gathered} (-4)^2+6\cdot(-4)+9 \\ 16-24+9=25-24=1 \end{gathered}$

therefore, the answer is 1