1)2*√64/√16*4 * 2 + √(7+4)² * √9-√36/3*(√81-√36)= 2)решить через дискреминант:
4x+8= -5x²
3)решить систему:
(1) -8y+x=3x
(2) 4x+5-6y=4
4)
5)
упростить выражение
16a-32/4(a-5)² * a²-10a+25/4a²+16=
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