Respuesta:
Holaaa
Explicación paso a paso:
A) x x ( - 3x) = 7 (x + 2)
-3² = 7 (x + 2)
-3x² = 7x + 14
-3² - 7x + 14 = 0
3x² + 7x - 14 = 0
a = 3, b = 7, c = 14
o si no x = -7 + √7² - 4 x 3 x 14 2 x 3
B) 1 - 6x x (-1) x (-3x) = 2x
1 - 18x² = 2x
1 - 18x² - 2x = 0
-18x² + 2x + 1 = 0
18x² + 2x - 1 = 0
a = 18, b = 2, c= -1
o si no x = -2 + √2² - 4 x 18 x (-1)
2 x 18
C) 5x − 5 (2x + 1) = −3 (4x+5)
5x - 10x - 5= -12x - 15
-5x - 5 = -12x - 15
-5x + 12x = -15 + 5
7x = -15 + 5
7x = -10
x = - 10
7
D) x − (1.3x) = 3 (4x+5)
x - 1.3 = 12x + 15
-0.3x = 12x + 15
- 0.3x - 12x = 15
x = - 15
12.3
x= - 50
41
Perdon por la demora, espero ayudar
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Respuesta:
Holaaa
Explicación paso a paso:
A) x x ( - 3x) = 7 (x + 2)
-3² = 7 (x + 2)
-3x² = 7x + 14
-3² - 7x + 14 = 0
3x² + 7x - 14 = 0
a = 3, b = 7, c = 14
o si no x = -7 + √7² - 4 x 3 x 14
2 x 3
B) 1 - 6x x (-1) x (-3x) = 2x
1 - 18x² = 2x
1 - 18x² = 2x
1 - 18x² - 2x = 0
-18x² + 2x + 1 = 0
18x² + 2x - 1 = 0
a = 18, b = 2, c= -1
o si no x = -2 + √2² - 4 x 18 x (-1)
2 x 18
C) 5x − 5 (2x + 1) = −3 (4x+5)
5x - 10x - 5= -12x - 15
-5x - 5 = -12x - 15
-5x + 12x = -15 + 5
7x = -15 + 5
7x = -10
x = - 10
7
D) x − (1.3x) = 3 (4x+5)
x - 1.3 = 12x + 15
-0.3x = 12x + 15
- 0.3x - 12x = 15
x = - 15
12.3
x= - 50
41
Perdon por la demora, espero ayudar