Question

решить уравнение......

Answer 1

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Answer 2

a) (5-y)²+17 = (y-3)²
25-10y+y²+17 = y²-6y+9
-10y+y²-y²+6y = 9-25-17
-4y = -33
y = 8,25
Ответ : 8,25.

б) 10+(3x-1)² = 20-6x
10+9x²-6x+1 = 20-6x
9x²-6x+6x = 20-10-1
9x² = 9
x² = 1
x = ⁺₋1
Ответ : -1 ; 1.