Question

How to find the vertex (x+4)(5x+2) so confused someone help me

Answer 1

foil the binomial and consider the standard quadratic formula
Ax^2+Bx+C=0
vertex=
\[(-\frac{ b }{ 2a },f(-\frac{ b }{ 2a }))\]

Answer 2

equation not formula

Answer 3

Right...so expand your 2 factors into a quadratic...and you'll take the 'b' value and divide it by 2 times the 'a' value...

what is (x + 4)(5x + 2) when expanded?