(a+bz)/(a+b)=(c+dz)/(d+c) if bc=ad

See below.

Step-by-step explanation:

(a+bz)/(a+b)=(c+dz)/(d+c) if bc=ad

bc = ad gives a = bc/d.

Substituting for a on the left side of the first equation:

(bc/d + bz)(bc/d + b)  =  (bc + bdz) / d  * d/ (bc + bd)

= (bc + bdz)(bc + bd)

But bc = ad so we have:

(ad + bdz) / (ad + bd)   (A)

From bc = ad we get c = ad/b.

Substituting for c on the right side of the first equation:

(ad/b + bz)(d + ad/b) =  (ad + bdz) / b  * b / (bd + ad)

= (ad + bdz ) / ( ad + bd) which is equal to (A) above.

So the original identity is true.

there has been genes found in the x chromosome of males that have been linked to [homo/hetero]sexuality. in addition to the reign of the x chromosome, a section of chromosome 8 has also been link to, "alot of ppl are so " these facts were proven true after a 2014 study of a gay male and his strait brother. according to newscientist.com,"chromosome 14 and is mainly active in the thyroid, but also the brain. called tshr, it makes a type of receptor protein that recognises and binds to a hormone that stimulates the thyroid. in this way, the gene plays an important role in controlling thyroid function. the fact that tshr seems to be involved in sexual orientation fits with evidence that thyroid function seems to be linked to sexuality."

in conclusion, "ppl are so gay" due to their genetics.

the graph in the attached figure

step-by-step explanation:

we have

using a graphing tool

the graph in the attached figure

the roots are ( x-intercepts) x=-0.5,x=1,x=3

the y-intercept is the point (0,3)