vertex of y=-5(x+7)(x+2)

label Algebra
account_circle Unassigned
schedule 1 Day
account_balance_wallet $5

how do I solve this using a t chart ?

Jul 2nd, 2014

y = -5(x+7)(x+2)

y = -5(x^2 +9x +14)

y = -5x^2 -45x -70

a = -5       b = -45         c = -70

for x we use the formula of vertex

x = -b/2a then

x = 45/-10   or   -9/2

now put the value of x in original equation , we get

y = -5(-9/2) -45(-9/2) -70

y = 45/2 + 405/2 -70

y = (45 + 405 - 140)/2

now y = 155

So HENCE vertex is

[ x , y ] = [ -9/2 , 155 ]

Jul 2nd, 2014

Studypool's Notebank makes it easy to buy and sell old notes, study guides, reviews, etc.
Click to visit
The Notebank
...
Jul 2nd, 2014
...
Jul 2nd, 2014
Oct 18th, 2017
check_circle
Mark as Final Answer
check_circle
Unmark as Final Answer
check_circle
Final Answer

Secure Information

Content will be erased after question is completed.

check_circle
Final Answer