How would the expression(x^2+4) (y^2+4) be rewritten using two squares?

Step-by-step explanation:

Given:  

Solution:

Now we rewrite the equation using two squares

multiply term by term,

rearrange the order

add and subtract 8xy

using formula  

its electric no smoke

step-by-step explanation:

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)