mathcalculus
posted by Shreya on .
solve for x. 3x2 = 2x+5+1
okay so for these one it be 3x2 = 2x+5 because 1 times in with 2x+5 or it be (2x5)

i think that be wrong the real answer have to be 4/5 and 8 i just not know how to get thats.

if 3x2 > 0 then 3x2 = 3x2
if 2x+5 > 0 then 2x+5 = 2x+5
in this case,
3x2 = 2x+5 + 1
x = 8
since 8 satisfies the conditions, it is a solution
if 3x2 < 0 then 3x2 = (3x2)
if 2x+5 > 0 then 2x+5 = 2x+5
in this case,
(3x2) = 2x+5 + 1
x = 4/5
since 4/5 satisfies the conditions, it is a solution
If you work through the other two choices, you will either find no more solutions, or duplicates of these.