A)x²-3x+2=0
B)2y²-14y+12=0
C)-x²+7x-10=0
D)5x²-x+7=0
E)y²-25=0
f)x²-1/4=0
g)5x²-10x=0
h)5+x²=9
i)7x²-3x=4x+x²
J)z²-8z+12=0
A) x² - 3x + 2 = 0
(x - 2)*(x - 1) = 0
x1 = 2
x2 = 1
B) 2y² - 14y + 12 = 0
y² - 7y + 6 = 0
(y - 6)*(y - 1) = 0
y1 = 6
y2 = 1
C) -x² + 7x - 10 = 0
x² - 7x + 10 = 0
(x - 5)*(x - 2) = 0
x1 = 5
x2 = 2
D) 5x² - x + 7 = 0
delta negativo náo tem raiz real
E) y² - 25 = 0
y² = 25
y1 = -5
y2 = +5
F) x² - 1/4 = 0
x² = 1/4
x1 = -1/2
x2 = +1/2
G) 5x² - 10x = 0
x² - 2x = 0
x*(x - 2) = 0
x1 = 0
H) 5 + x² = 9
x² = 4
x1 = -2
x2 = +2
I) 7x² - 3x = 4x + x²
6x² - 7x = 0
x*(6x - 7) = 0
x2 = 7/6
J)
z² - 8z + 12 = 0
(z - 2)(z - 6) = 0
z1 = 2
z2 = 6
Peço que avalie por gentileza a resposta !
pronto
Dois pontos! Hehe ^^
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Verified answer
A) x² - 3x + 2 = 0
(x - 2)*(x - 1) = 0
x1 = 2
x2 = 1
B) 2y² - 14y + 12 = 0
y² - 7y + 6 = 0
(y - 6)*(y - 1) = 0
y1 = 6
y2 = 1
C) -x² + 7x - 10 = 0
x² - 7x + 10 = 0
(x - 5)*(x - 2) = 0
x1 = 5
x2 = 2
D) 5x² - x + 7 = 0
delta negativo náo tem raiz real
E) y² - 25 = 0
y² = 25
y1 = -5
y2 = +5
F) x² - 1/4 = 0
x² = 1/4
x1 = -1/2
x2 = +1/2
G) 5x² - 10x = 0
x² - 2x = 0
x*(x - 2) = 0
x1 = 0
x2 = 2
H) 5 + x² = 9
x² = 4
x1 = -2
x2 = +2
I) 7x² - 3x = 4x + x²
6x² - 7x = 0
x*(6x - 7) = 0
x1 = 0
x2 = 7/6
J)
z² - 8z + 12 = 0
(z - 2)(z - 6) = 0
z1 = 2
z2 = 6
Peço que avalie por gentileza a resposta !
pronto
Dois pontos! Hehe ^^