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banukenzhebek
@banukenzhebek
July 2022
1
16
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решите уравнение
1) 81х^2-9=0
2) 16-4у^2=0
3) 16с^2-49=0
4) 64х^2-25=0
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Answers & Comments
acar
1) (9x-3)(9x+3)=0
9x=3 and 9x=-3
x=1/3 or x=-1/3
2) (4-2y)(4+2y)=0
2y=4 2y=-4
y=2 y=-2
3)(4c-7)(4c+7)=0
4c=7 4c=-7
c=7/4 c=-7/4
4)(8x-5)(8x+5)=0
8x=5 8x=-5
x=5/8 x=-5/8
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Answers & Comments
9x=3 and 9x=-3
x=1/3 or x=-1/3
2) (4-2y)(4+2y)=0
2y=4 2y=-4
y=2 y=-2
3)(4c-7)(4c+7)=0
4c=7 4c=-7
c=7/4 c=-7/4
4)(8x-5)(8x+5)=0
8x=5 8x=-5
x=5/8 x=-5/8