ответ: (x-3)(4x+5) = (2x-1)2
4x²+5x-12-15 = 4x-2
4x²-x = 25
4x²-x-25 = 0
a= 4; b= -1; c= -25
∆= b²-4ac = 401>0
x1 = -b +√∆ = 1+√401
2a 8
X2= -b+√∆ = 1-√401
Объяснение:
ответ: (x-3)(4x+5) = (2x-1)2
4x²+5x-12-15 = 4x-2
4x²-x = 25
4x²-x-25 = 0
a= 4; b= -1; c= -25
∆= b²-4ac = 401>0
x1 = -b +√∆ = 1+√401
2a 8
X2= -b+√∆ = 1-√401
2a 8
Объяснение: