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рико19
@рико19
July 2022
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помогитеее . плиз буду благодарна умоляяяю
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Answers & Comments
marie237456789
1)(y-2)(y+3)-(y-2)²≤6y-11
y²+3y-2y-6-(y²-4y+4)≤6y-11
y²+3y-2y-6-y²+4y-4≤6y-11
5y-10≤6y-11
5y-6y≤-11+10
-y≤-1
y≥1
2)(y+3)(y-9)-(y+4)²≥5-13y
y²-9y+3y-27-(y²+8y+16)≥5-13y
y²-9y+3y-27-y²-8y-16≥5-13y
-14y-43≥5-13y
-14y+13y≥-43-5
-y≥-48
y≤48
3)(3x+2)²-(4-3x)²<37x+14
(3x+2-4+3x)(3x+2+4-3x)<37х+14
6(6х-2)<37х+14
36х-12<37х+14
36х-37х<14+12
-х<26
х>-26
4)(5х-2)²-15>(4х-1)²+9х²
25х-20х+4-15>16х-8х+1+9х²
5х-11>8х+1+9х²
5х-8х-9х²>1+11
-3х-9х²>12
-3х-9х²-12>0
-3(х+3х²+4)>0
х∈∅
2 votes
Thanks 1
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Answers & Comments
y²+3y-2y-6-(y²-4y+4)≤6y-11
y²+3y-2y-6-y²+4y-4≤6y-11
5y-10≤6y-11
5y-6y≤-11+10
-y≤-1
y≥1
2)(y+3)(y-9)-(y+4)²≥5-13y
y²-9y+3y-27-(y²+8y+16)≥5-13y
y²-9y+3y-27-y²-8y-16≥5-13y
-14y-43≥5-13y
-14y+13y≥-43-5
-y≥-48
y≤48
3)(3x+2)²-(4-3x)²<37x+14
(3x+2-4+3x)(3x+2+4-3x)<37х+14
6(6х-2)<37х+14
36х-12<37х+14
36х-37х<14+12
-х<26
х>-26
4)(5х-2)²-15>(4х-1)²+9х²
25х-20х+4-15>16х-8х+1+9х²
5х-11>8х+1+9х²
5х-8х-9х²>1+11
-3х-9х²>12
-3х-9х²-12>0
-3(х+3х²+4)>0
х∈∅