2x²+4x-9=0
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2x²+4x-9=0
2x²+4x-9=0
2x²+4x-9=0
2x²+4x-9=0
x²+2x-9/2=0
x²+2x+1=1+9/2
(x-1)²=11/2
x-1=±(11/2)
x1=1+√22/2 x2=1-√22/2
2x²+4x-9=0
2x²+4x-9=0
2x²+4x-9=0
2x²+4x-9=0
x²+2x-9/2=0
x²+2x+1=1+9/2
(x-1)²=11/2
x-1=±(11/2)
x1=1+√22/2 x2=1-√22/2