Question

x(1-x)+(2-x)^2+(3+x)^2-1=(x-1)(4-x)+(2x-1)(2+x) va rog ajutati-ma trb x=2

Answer 1

x(1-x)+(2-x)²+(3+x)²-1=(x-1)(4-x)+(2x-1)(2+x)
x-x²+4-4x+x²+9+6x+x²-1=4x-x²-4+x+4x+2x²-2-x
x²+3x+12=x²+8x-6
x²-x²+3x-8x=-12-6
-5x=-18 inmultim cu -1
x=18/5