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alinakuprina678
@alinakuprina678
June 2023
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Verified answer
Ответ:
a) x^2+12x-6^2 - x^2+5^2 = 79
12x-36+25=79
12x=79+36-25
12x=90:12
x= 7,5
b) (4x^2-12x+9) - (7^2-28x+4x^2) = 2
4x^2 - 12x + 9 - 49 + 28x - 4x^2 = 2
16x = 2-9+49:16
x= 2.3
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Answers & Comments
Verified answer
Ответ:a) x^2+12x-6^2 - x^2+5^2 = 79
12x-36+25=79
12x=79+36-25
12x=90:12
x= 7,5
b) (4x^2-12x+9) - (7^2-28x+4x^2) = 2
4x^2 - 12x + 9 - 49 + 28x - 4x^2 = 2
16x = 2-9+49:16
x= 2.3