506 507 508 509 срочно надо

Question

506 507 508 509
срочно надо

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Comments

509а)-8-37х+8х-2 (1+2х)^2=35-8-37х+8х^2-2-8х-8х^2=35-45-45х=0-45х=45х=45/(-45)х=-1б)40+х^3-36х+6х^2+64-х^3-48х+12х^2=2 (3х-10)^2-16872+36х=036х=-72х=-72/36х=-2

Answer 1

506
а) 12+х+х^3+12х^2-(х+4)^3=89
12+х+х^3+12х^2-64-х^3-48х-12х^2=89
-141-47х=0
-47х=141
х=141/(-47)
х=-3

б) 25-36у^2+8у^3+30у-(2у-3)^3=4
25-36у^2+8у^3+30у+27-54у-8у^3+36у^2=4
48-24у=0
-24у=-48
у=-48/(-24)
у=2

508
а) -189-189а=0
-189а=189
а=189/(-189)
а=-1

б) -64+у^3-12у^2+48у-(2+у)(7-у)^2=27
-189+27у=0
27у=189
у=189:27
у=7
507,509 я не знаю