document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=146648>Question 146648</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I NEED EXPLANATION IN A COUPLE OF MATH PROBLEMS they are all odd the answers are in the back of the book but i want to know how to do them can someone  EXPLAIN HOW TO SOLVE THEM SO I CAN BE READY FOR AN UPCOMING EXAM.i will greatly appreciated....\r<BR>\n" );
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document.write( "Directions: Use the function to evaluate the indicated expressions and simplify.<BR>\n" );
document.write( "27) f(x)= x + 4 ; f(x^2), (f(x))^2\r<BR>\n" );
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document.write( "Directions: Find the domain of the function <BR>\n" );
document.write( "37) f(x) = 2x<BR>\n" );
document.write( "41) f(x) = (1)/(x-3)<BR>\n" );
document.write( "43) f(x)= (x+2)/(x^2-1)<BR>\n" );
document.write( "45) f(x)= f(x)= squareroot of (x-5)<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #107113 by </B><A HREF=/tutors/aboutme.mpl?userid=oscargut><B>oscargut(2103)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=oscargut><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=oscargut><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=107113\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 27) f(x)= x + 4 ; f(x^2), (f(x))^2 \r<BR>\n" );
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document.write( "f(x^2)= x^2+4 (you have to put x^2 instead of x)<BR>\n" );
document.write( "(f(x))^2 =(x+4)^2=x^2+8x+16\r<BR>\n" );
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document.write( "Directions: Find the domain of the function \r<BR>\n" );
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document.write( "The domain of polynomials are all real numbers<BR>\n" );
document.write( "The domain of squareroot of f(x) are all real numbers that makes f(x)>=0<BR>\n" );
document.write( "because the squareroot of a negative number is not real<BR>\n" );
document.write( "The domain of quotient of polynomials (P(x)/Q(x)) are all real numbers that makes Q(x)not= to 0 because you can not divide by 0<BR>\n" );
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document.write( "37) f(x) = 2x  domain are all real numbers (R)<BR>\n" );
document.write( "41) f(x) = (1)/(x-3) domain are all real numbers except {x/x-3=0} so R-{3}<BR>\n" );
document.write( "43) f(x)= (x+2)/(x^2-1) domain are all real numbers except<BR>\n" );
document.write( " {x/x^2-1=0} so R-{1,-1}<BR>\n" );
document.write( "45) f(x)= squareroot of (x-5)<BR>\n" );
document.write( "domain are all real numbers that makes x-5>=0 so are real numbers x/x>=5  </SPAN>\n" );
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