The zeros are -2 and 4 but idk the vertex
<span>These ones are correct:
Multiply the value of the first variable by one of the original equations to solve for the second variable.
</span><span>Solve for one of the variables
</span><span>Substitute the value of the known variable into one of the original equations to solve for the unknown variable.</span>
Answer:
-9
Step-by-step explanation:
i used a calculater soya your welcome