Multiply 11-√5 by 11+<span>√5 .the answer is 121-5=116
so the fraction is turned into (7-2</span>√5)(11+<span>√5)/116
77+7</span>√5 -22√5 -10=66-15<span>√5/116</span>
So if the "i" becomes confusing, just think of it as x
so it would become (-12+48x) +(15+21x)
then you would split up the terms by constants and coefficients
-12+15 +48x+21x
3+69x and then you substitute back for i
3+69i
it is unreasonable because 4.23 is bigger than 4.135! Look at the 10s place - 1 is smaller than 2, and everything afterwards is irrelevant. There could be as many zeros or any combination of numbers you want, but as long as that tens place is larger (2 vs 1), than it's not reasonable to say 4.2 is smaller!!
Answer:
16 36 169 100
Step-by-step explanation:
