5 Resolva a equação do 2° Grau x -7x + 6 = 0a=........ b =...... ec= A=b²-4.a.c A=( )²-4.().() X =. X= x'= ...... - b ± √à 2a -( ) ± √ 2.( ) ... e x' = ....
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X^2 -7X + 6 = 0 A= 1 B= -7 C= 6
Δ= (-7)^2 - 4 * 1 * 6
Δ= 49-24
Δ = 25
X= -(-7) ± √25
-----------------
2*1
X= 7 ± 5
--------
2
X1= 7 - 5 X2= 7 + 5
------- = 2 / 2 = 1 ------- = 12 / 2 = 6
2 2
Resposta Final : X = (1 ; 6)