Quay lại đáp án

	3	bớt 32 ký tự trong đáp án		Sửa 26-01-16 04:31 PM ๖ۣۜTQT☾♋☽ 1
$=( 9x^2 +36xy +36y^2 ) +(18y^2 -24yz + 8z^2)+ (8x^2 +16xz + 8z^2) + 2x^2 +5 \geqslant 0$ $\Leftrightarrow 9(x+2y)^2 + 2(3y - 2z)^2 + 8(x-z)^2 + 2x^2 + 5\geqslant 0$ $\Rightarrow :đpcm$ $=( 9x^2 +36xy +36y^2 ) +(18y^2 -24yz + 8z^2)+ (8x^2 +16xz + 8z^2) + 2x^2 +5 \geqslant 0$ $\Leftrightarrow 9(x+2y)^2 + 2(3y - 2z)^2 + 8(x-z)^2 + 2x^2 + 5\geqslant 0$ $\Rightarrow :đpcm$ đúng thì tick v bên trái nha bạn $=( 9x^2 +36xy +36y^2 ) +(18y^2 -24yz + 8z^2)+ (8x^2 +16xz + 8z^2) + 2x^2 +5 \geqslant 0$ $\Leftrightarrow 9(x+2y)^2 + 2(3y - 2z)^2 + 8(x-z)^2 + 2x^2 + 5\geqslant 0$ $\Rightarrow :đpcm$

	2	thêm 32 ký tự trong đáp án		Sửa 26-01-16 04:19 PM ๖ۣۜTQT☾♋☽ 1
$=( 9x^2 +36xy +36y^2 ) +(18y^2 -24yz + 8z^2)+ (8x^2 +16xz + 8z^2) + 2x^2 +5 \geqslant 0$ $\Leftrightarrow 9(x+2y)^2 + 2(3y - 2z)^2 + 8(x-z)^2 + 2x^2 + 5\geqslant 0$ $\Rightarrow :đpcm$ đúng thì tick v bên trái nha bạn $=( 9x^2 +36xy +36y^2 ) +(18y^2 -24yz + 8z^2)+ (8x^2 +16xz + 8z^2) + 2x^2 +5 \geqslant 0$ $\Leftrightarrow 9(x+2y)^2 + 2(3y - 2z)^2 + 8(x-z)^2 + 2x^2 + 5\geqslant 0$ $\Rightarrow :đpcm$ $=( 9x^2 +36xy +36y^2 ) +(18y^2 -24yz + 8z^2)+ (8x^2 +16xz + 8z^2) + 2x^2 +5 \geqslant 0$ $\Leftrightarrow 9(x+2y)^2 + 2(3y - 2z)^2 + 8(x-z)^2 + 2x^2 + 5\geqslant 0$ $\Rightarrow :đpcm$ đúng thì tick v bên trái nha bạn

	1	tạo mới		Trả lời 26-01-16 04:17 PM ๖ۣۜTQT☾♋☽ 1
$=( 9x^2 +36xy +36y^2 ) +(18y^2 -24yz + 8z^2)+ (8x^2 +16xz + 8z^2) + 2x^2 +5 \geqslant 0$ $\Leftrightarrow 9(x+2y)^2 + 2(3y - 2z)^2 + 8(x-z)^2 + 2x^2 + 5\geqslant 0$ $\Rightarrow :đpcm$

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