Ecuaciones 2x + 21 = 3x - 6 12(x - 2) = 1 - x x + 5x - 4 = 18 - 2x 3x - 2 + 7x = 7 - 1 4(2x + 3) - 2x = 4x + 20 34 = 3x - 6 + 2x.
ax² + bx + c = 0
1)
2x + 21 = 3x - 6
21 + 6 = 3x - 2x
27 = x
2)
12(x - 2) = 1 - x
12x - 24 = 1 - x
12x + x = 1 + 24
13x = 25
x = 25 \ 13
3)
x + 5x - 4 = 18 - 2x
x + 5x + 2x = 18 + 4
8x = 22
x = 22 \ 8
4)
3x - 2 + 7x = 7 - 1
3x + 7x = 7 - 1 + 2
10x = 8
x = 8 \ 10
5)
4(2x + 3) - 2x = 4x + 20
8x + 12 - 2x = 4x + 20
8x - 2x - 4x = 20 - 12
2x = 8
x = 8 \ 2
x = 4
6)
34 = 3x - 6 + 2x
34 + 6 = 3x + 2x
40 = 5x
40 \ 5 = x
8 = x.
(x - 5)² + x(x + 3) = 25 Efectuando x² - 10x + 25 + x² + 3x = 25 Reduciendo términos semejantes 2x² - 7x = 0 Factorizando x(2x - 7) x = 0 x1 = 0 2x - 7 = 0 2x = 7 x2 = 7 / 2 S = {0, 7 / 2}.
(5x - 3)(x + 2) = x(7 - x)5x² + 10x - 3x - 6 = 7x - x²5x² + 7x - 6 = 7x - x²5x² + x² = 6 + 7x - 7x6x² = 6x² = 1x = √1x = 1.
Respuesta : arribaExplicación paso a paso :
E) x³ = 200 g) x³ + 27 = 0 x = ∛200 x³ = 0 - 27 x = 5, 848 x = ∛ - 27 verif : 5, 848³ = 199, 9 = 200 x = - 3 Verif : - 3³ + 27 = 0 - 27 + 27 = 0 f) x³ - 8 = 0 h) x³ - 37 = 179 i) x³ + 19 = - 30 x³ = 0 + 8 x³ = 179 + 37…