What is the vertex form of #y= 5x^2 + 5x -12 #?
take 5 as a common factor from the first two terms
for completing square you take half the coefficient of x and square it
and we subtract 5/4 because from completing square we get 1/4 so 1/4 times 5 is 5/4 because it is positive inside it must be negative then
from the law
the vertex is =