Toán Lớp 8: (2x+1/3)^2-(1-2x)^2=16/9
Tìm x,y
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Toán Lớp 8: (2x+1/3)^2-(1-2x)^2=16/9
Tìm x,y
Comments ( 2 )
(2x+⅓)²-(1-2x)²
(2x)²+2.2x.⅓+(⅓)²-[1²-2.1.2x+(2x)²]=16/9
4x²+4/3x+1/9-1+4x-4x²=16/9
16/3x-8/9=16/9
16/3x=16/9+8/9
16/3x=8/3
x=8/3:16/3
x=1/2
Cho mình gửi bạn nha
Chúc bạn học tốt^^