Решите плиз оч надо

Question

Решите плиз оч надо

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Answer 1

(2c²-2b²)/(4b²-8bc+4c²)=2(c²-b²)/4(b²-2bc+c²)=2(c-b)(c+b)/(c-b)²=
=(c+b)/2(c-b)
c=1/3,b=1/4
(1/3+1/4):[2(1/3-1/4)]=7/12:(2*1/12)=7/12:1/6=7/12*6/1=7/2=3,5

(x²+25)/(x-5)³+10x/(5-x)³=(x²+25)/(x-5)³-10x/(x-5)³=(x³+25-10x)/(x-5)³
=(x-5)²/(x-5)³=1/(x-5)
x=5,125
1/(5,125-5)=1/0,125=8

Comments

Sedinalana,а откуда 2с я не понимаю у меня же другие примеры

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А пункты а и в

Answer 2

Б)с+b/2b-2c при b=0,25, c=1/3 получим
(1/4+1/3)/2*0,25-2*1/3=(3/12+4/12)/1/2-2/3=7/12/(-1/6)=7/12*(-6)=-7/2=-3,5

Comments

(x²+25)/(x-5)³+10x/(5-x)³=(x²+25)/(x-5)³-10x/(x-5)³=(x³+25-10x)/(x-5)³
=(x-5)²/(x-5)³=1/(x-5)
x=5,125
1/(5,125-5)=1/0,125=8