document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1028648>Question 1028648</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Let f(a,b) = 2a - 3b^2 + 7. If f(b,3) = 90, then what is b? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #644381 by </B><A HREF=/tutors/aboutme.mpl?userid=robertb><B>robertb(5830)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=robertb><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=robertb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=644381\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f%28a%2Cb%29+=+2a+-+3b%5E2+%2B+7 ALIGN=MIDDLE  ALT=\"f%28a%2Cb%29+=+2a+-+3b%5E2+%2B+7\"   DISABLED_style= \"max-width:90%; height:auto;\" > ==> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f%28b%2C3%29+=+2b+-+3%2A3%5E2+%2B+7+=+90 ALIGN=MIDDLE  ALT=\"f%28b%2C3%29+=+2b+-+3%2A3%5E2+%2B+7+=+90\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "==> 2b - 27 + 7 = 90 ==> 2b - 20 = 90 ==>  2b = 110 ==> b = 55. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );