(3x+5)³-27x³-135x²=4+220x
27х³+135х²+225х+125-27х³-135х²=4+220х
225х+125=4+220х
225х-220х=4-125
5х=-121
х=-121/5
х=-24 1/5
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(3x+5)³-27x³-135x²=4+220x
27х³+135х²+225х+125-27х³-135х²=4+220х
225х+125=4+220х
225х-220х=4-125
5х=-121
х=-121/5
х=-24 1/5