Move -10 under the zero which will be x2+4x=-10
Then divide 4x under -10 which will get you -2.5 then after that you’re left with x2 =-2.5x which the you’ll square root so you don’t have to worry about being confused with the x2
So square root both side and you’ll be left with x=2.5
The cost of per scarf is $2.50 because if you divide $30 by 12 scarves you get $2.50
B hope this helps good luck
T= 5/2 - b/2.................
