+0

# I posted this question before but the screenshot didn't cover it all

-1
213
5 I posted this question before but the screenshot didn't cover it all

Mar 29, 2020

#1
+2

Look for a coupleof definite points    (2,-2)   and   (4,-8)  are on the graph and easily defined

a2 / b  = -2    and    re arrange   a2/-2 = b    (sub this into the next equation)

a4 / b = -8

a^4/  (a^2/-2)  = -8

-2a^2 = -8

a^2 = 4        a = 2     or -2   (we'll just take the positive root)

then b = -2

a+b = 2-2 = 0

Mar 29, 2020
#2
-2

This wasn't right

qwertyzz  Mar 29, 2020
#3
+1

That doesn't seem so appreciative. Are you even sure you entered the correct number? I graphed it on desmos, and I got the exact same graph in your problem. There doesn't seem to be a problem in his calculations either.

AnExtremelyLongName  Mar 29, 2020
#4
+1

I am sure I entered the right number.  I put 0 in and it said it was wrong

qwertyzz  Mar 29, 2020
#5
+2

I may have noticed his error. (4, -8) is supposed to be (3, -8). You may use his method and solve it correctly now.

AnExtremelyLongName  Mar 30, 2020