49-(2-x)²<span>=0,
-(2-х)</span>²=-49,
(2-х)²=49,
2-х=<span>±7,
2-х=7, 2-х=-7,
-х=7-2, -х=-7-2,
-х=5, -х=-9,
х=-5. х=9.
Ответ: -5; 9.
</span>
-6(2х-5)=9(х+1)
-12x +30 = 9x +9
-12x - 9x = 9 -30
-21x = - 21
x=(-21):(-21)
x=1
(х - у)^4
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