(x-2)²-2(2-2x)-(1+x)(1-x)和其他数学题一.(x-2)²-2(2-2x)-(1+x)(1-x),x=负十二分之七二.In a triangle,if the measures of three angles are x,2x and 3x respectively,then the measure of the largest angl

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(x-2)²-2(2-2x)-(1+x)(1-x)和其他数学题一.(x-2)²-2(2-2x)-(1+x)(1-x),x=负十二分之七二.In a triangle,if the measures of three angles are x,2x and 3x respectively,then the measure of the largest angl

(x-2)²-2(2-2x)-(1+x)(1-x)和其他数学题一.(x-2)²-2(2-2x)-(1+x)(1-x),x=负十二分之七二.In a triangle,if the measures of three angles are x,2x and 3x respectively,then the measure of the largest angl
(x-2)²-2(2-2x)-(1+x)(1-x)和其他数学题
一.(x-2)²-2(2-2x)-(1+x)(1-x),x=负十二分之七
二.In a triangle,if the measures of three angles are x,2x and 3x respectively,then the measure of the largest angle is( ).
三.方程/x-2/+/x+3/=6的解的个数是多少 //为绝对值符号

(x-2)²-2(2-2x)-(1+x)(1-x)和其他数学题一.(x-2)²-2(2-2x)-(1+x)(1-x),x=负十二分之七二.In a triangle,if the measures of three angles are x,2x and 3x respectively,then the measure of the largest angl
一、原式=2x²-1=-23/72
二、最大角=90°
三、有两个解,分别为-3.5或2.5