Question 604629
4x^3+3x^2=64x+48


4x^3+3x^2-64x-48=0


(4x^3+3x^2)+(-64x-48)=0


x^2(4x+3)+(-64x-48)=0


x^2(4x+3)-16(4x+3)=0


(x^2-16)(4x+3)=0


(x-4)(x+4)(4x+3)=0


I'll let you take it from here.