X2 + 4x - 21
Answer: (x + 7)(x - 3)
Answer:
c
Step-by-step explanation:
just substitute a big number into x like 10^6 as it approaches
and a big negative number like -10^6 as it approaches
I believe you are referring to the half-life formula, which is used to calculate the half-life (when the substance drops to half of its original amount) of radioactive substances. The equation is as follows:
<em>A</em> is the remaining amount
<em>P</em> is the initial amount
<em>t</em> is the time that has passed
<em>h</em> is the half-life of the substance
When plugging values into the equation, make sure that <em>t </em>and <em>h </em>are both measured in the same unit (e.g. <em>t </em>days and <em>h </em>days), as well as <em>A </em>and <em>P</em>.
X would equal negative four
an negative can't be a absolute value