Question

помогите решить. . ......

Answer 1

1) 21x^5yz^6/14x^4y^2z^6= 21x^5/14x^4 * y/y^2 * z^6/z^6= 1.5xy
3a+6b/a^2+2ab=3(a+2b)/a(a+2b)=3/a
2) a^2-8a+16/a-4=a-4/a-4=1
a^2-8a+16=0
D=64-4*1*16=0
x=8/2=4
3) 2p-4q/p^2-4pq+4q^2=2(p-2q)/(p-2q)^2=2/(p+2q)=p+q