Con la formula general va asi a=1, b= -3, c=2
-b±√b²-4ac -(-3)±√(-3)²-4(1)(2) 3±√9-8 3±√1 3±1
----------------- = ---------------------------- =-------------- =---------- = -------
2a 2(1) 2 2 2
3-1 2 3+1 4
x₁= ------- = ----- = 1 x₂= ------- = ------ = 2
2 2 2 2
Sustitución
x²-3x+2=0
1.-(-2)²-3(-2)+2=0 2.- (2)-3(2)+2=0 3.-(1)-3(1)+2=0
4+6+2=0 2-6+2=0 1-3+2=0
12=0 0=0 0=0
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Con la formula general va asi a=1, b= -3, c=2
-b±√b²-4ac -(-3)±√(-3)²-4(1)(2) 3±√9-8 3±√1 3±1
----------------- = ---------------------------- =-------------- =---------- = -------
2a 2(1) 2 2 2
3-1 2 3+1 4
x₁= ------- = ----- = 1 x₂= ------- = ------ = 2
2 2 2 2
Sustitución
x²-3x+2=0
1.-(-2)²-3(-2)+2=0 2.- (2)-3(2)+2=0 3.-(1)-3(1)+2=0
4+6+2=0 2-6+2=0 1-3+2=0
12=0 0=0 0=0