# What is the vertex of y= 3(x+5)^2-30x-25 ?

May 24, 2018

$50$

#### Explanation:

$y = 3 \cdot {\left(x + 5\right)}^{2} - 30 x - 25$

=$3 \cdot \left({x}^{2} + 10 x + 25\right) - 30 x - 25$

=$3 {x}^{2} + 30 x + 75 - 30 x - 25$

=$3 {x}^{2} + 50$

Thus, vertex of $y$ is $50$