a方+4a+3/2a-4除以a+2/a-2乘以(a+3) 等于?

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a方+4a+3/2a-4除以a+2/a-2乘以(a+3) 等于?

a方+4a+3/2a-4除以a+2/a-2乘以(a+3) 等于?
a方+4a+3/2a-4除以a+2/a-2乘以(a+3) 等于?

a方+4a+3/2a-4除以a+2/a-2乘以(a+3) 等于?
a^2+4a+3=(a+1)(a+3)

a方+4a+3/2a-4除以a+2/a-2乘以(a+3)=(a+1)/(2a+4)

[(a^2+4a+3)/(2a-4)]/[(a+2)/(a-2)]*(a+3)
={(a+1)(a+3)/[2(a-2]}*[(a-2)/(a+2)]*(a+3)
=[(a+1)(a+3)(a-2)(a+3)]/[2(a-2)(a+2)]
=(a+1)(a+3)^2/(2a+4)