(x/4)(x/4)+(20-x/4)(20-x/4)=11

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(x/4)(x/4)+(20-x/4)(20-x/4)=11(x/4)(x/4)+(20-x/4)(20-x/4)=11(x/4)(x/4)+(20-x/4)(20-x/4)=11两边乘16x

(x/4)(x/4)+(20-x/4)(20-x/4)=11
(x/4)(x/4)+(20-x/4)(20-x/4)=11

(x/4)(x/4)+(20-x/4)(20-x/4)=11
两边乘16
x²+(20-x)²=176
2x²-40x+400=176
x²-20x+112=0
判别式小于0,无解

f(2x)件袋困T/2
f(3x)件袋困T/3
f(4x)件袋困T/4
疥笆舰困滇T,T/2,T/3,T/4弄呵井给擒眶
篓尸灰弄呵井给擒眶下尸熟弄呵络给傍眶
T舰困T/1
疥笆尸灰弄呵井给擒眶困T
尸熟弄呵络给傍眶困1
疥笆f(x)+f(2x)+f(3x)+f(4x)弄件袋困T

*-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || 通分:x+4/x^2-8x+15,x-5/x^2+x-12,x-3/x^2-x-20 (x/x-2-x/x+2)/4x/x-2 x*x*x-4x*x+12x分解因式 x*x*(1/4)=20x 因式分解（X-X)(x-X-4)+4 1/(1-x)+1/(1+x)+2/(1+x*x)+4/(1+x*x*x*x)+8/(1-x*x*x*x*x*x*x*x)怎么做 4x-3x(20-x)=4求x (x^2+4x)^2-x^2-4x-20 4x-3x(20-x)=5x x-20%x=4 4X平方-20x 4x方-20x x+4x＝20 x-20%x=4 x^4表示（） A.4x B.x+x+x+x c.x*x*x*x D.x+4 3(x^4)^6-2(x^5×x^3)^3+x^11×x^13+x^20×x^3×x 4x-3x(20-x)=5x-7x(20-x)