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LaaLaaLaand
@LaaLaaLaand
July 2022
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Корень из 7 + 9x = 5
Корень из 60 + 8x = 6
Корень из 20 - 4x = 2
Корень из -7 - 4x = 5
Корень из 85 + 2x = 9
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1)√7+9x=5 2)√60+8x=6
Возведем обе части уравнения в квадрат. (√60+8x)²=6²
(√7+9x)²=5² 60+8x=36
7+9x=25 8x=36-60
9x=25-7 8x= -24
9x=18 x= -24/8
x=18/9 x= -3.
x=2.
3)√20-4x=2 4)√-7-4x=5 5)√85+2x=9
(√20-4x)²=2² (√-7-4x)²=5² (√85+2x)²=9²
20-4x=4 -7-4x=25 85+2x=81
-4x=4-20 -4x=25+7 2x=81-85
-4x= -16 -4x=32 2x= -4
x= -16/-4 x=32/-4 x= -4/2
x=4. x= -8. x= -2.
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Answers & Comments
Verified answer
1)√7+9x=5 2)√60+8x=6Возведем обе части уравнения в квадрат. (√60+8x)²=6²
(√7+9x)²=5² 60+8x=36
7+9x=25 8x=36-60
9x=25-7 8x= -24
9x=18 x= -24/8
x=18/9 x= -3.
x=2.
3)√20-4x=2 4)√-7-4x=5 5)√85+2x=9
(√20-4x)²=2² (√-7-4x)²=5² (√85+2x)²=9²
20-4x=4 -7-4x=25 85+2x=81
-4x=4-20 -4x=25+7 2x=81-85
-4x= -16 -4x=32 2x= -4
x= -16/-4 x=32/-4 x= -4/2
x=4. x= -8. x= -2.