 math help ? - XP Math - Forums Sign Up FREE! | Sign In | Classroom Setup | Common Core Alignment  XP Math - Forums math help ? 08-07-2007 #1 knightanais Guest   Posts: n/a math help ? Multiply : (âˆš3+âˆš5)(2âˆš3-3âˆš5)simplify:6___âˆš5- âˆš2simplify the complex fraction : 4 3 __ + __ x x^ 2 _________ 3 4 ___ - ___ x x^ 2solve for x : âˆš 2x-7+5=8can you show me how to do the work  08-07-2007 #2 losh61 Guest   Posts: n/a (1) (sqrt(3)+sqrt(5))*(2sqrt(3)-3sqrt(5)) = 6 - 3sqrt(15) + 2sqrt(15) - 15 = -9 - sqrt(15)(2) 6/(sqrt(5) - sqrt(2)) *(sqrt(5) + sqrt(2))/(sqrt(5) + sqrt(2)) = 2sqrt(5) + 2sqrt(2)(3) find common denominators. flip the bottom fraction and multiply it by the top. final answer = (4x+3)/(3x-4)(4) sqrt(2x-7) +5 = 8 sqrt(2x-7) = 3 (sqrt(2x-7))^2 = 3^2 x = 8 Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Forum Rules
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