Toán Lớp 8: Tìm x
(X-3).(2x-1)-2(x-2)mũ 2=0
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Toán Lớp 8: Tìm x
(X-3).(2x-1)-2(x-2)mũ 2=0
Comments ( 2 )
<=>2x^2-x-6x+3-[2.(x^2-4x+4)]=0
<=>2x^2-7x+3-(2x^2-8x+8)=0
<=>2x^2-7x+3-2x^2+8x-8=0
<=>x-5=0
<=>x=5
Vậy phương trình có nghiệm S={5}