Tìm x biết x^4+4x^3+4x^2)=0
B= x^3+x^2y - xy^2 - y^3 tại x=3,25 ; y= 6,75
3X^2 +8x+5=0

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Which ahows the graph of the solution set of 6x+4y< 12

Acompany charges $0.10 for each letter engraved. bobby plans to spend no more than $5.00 on the engraving on a jewelry box. write and solve an inequality to find the maximum number of letters he can have engraved.