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nguyenkhanhlinh12323
2 năm trước
Giúp mình với!!! Tìm x: a)($x+2)^{2}$- $x^{2}$ +4=0 b)($x-3)^{2}$ -4=0 c)($2x+1)^{2}$-4( $x+2)^{2}$=9 d)( $3x-1)^{2}$ +2($x+3)^{2}$ +11(x+1)(1-x)=6 e)6($x+1)^{2}$ +2(x-1)($x^{2}$ +x+1)-2($x+1)^{3}$ =32
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