Get into form a(x-h)²+k
complete the square
-3x²-18x-31
group x terms
(-3x²-18x)-31
undistribute the -3
-3(x²+6x)-31
take 1/2 of the linear coefient (6) and squaer it
6/2=3, 3²=9
add positive and negative of it inside parenthasees
-3(x²+6x+9-9)-31
complete the square
-3((x+3)²-9)-31
expand
-3(x+3)²+27-31
-3(x+3)²-4 is vertex form
Answer:5
Step-by-step explanation:
Answer:
y-9= -3(x+2)
Step-by-step explanation:
y-y1= "M" (x-x1)
y1= 9
X1= -2
Hello :
f(r) = πr².... r <span> <span>><span> 0
</span></span></span>the domain is : <span>] 0; + ∞[<span> </span></span>
Answer:
x = 2.4
Step-by-step explanation:
see image for explanation.
Hope it helps