Question

(2x+1)x-3²=2(x+1)
ayuda. GR​

Answer 1

Resolver.

Aplicas productos notables.

(a - b)² = a² - 2ab + b²

(x - 2)² - (3 - x)² = 1

x² - 2(x)(2) + 2² - (3² - 2(3)(x) + x²) = 1

x² - 4x + 4 - ( 9 - 6x + x²) = 1

x² -4x + 4 - 9 + 6x - x² = 1

x² - x² - 4x + 6x + 4 - 9 = 1

2x - 5 = 1

2x = 1 +5

2x = 6

x = 6/2

x = 3

Respuesta.

x =3

Answer 2

Respuesta:

$2x^2-x=11\quad :\quad x=\frac{1+\sqrt{89}}{4},\:x=\frac{1-\sqrt{89}}{4}$

Explicación paso a paso:

(2x+1)x - 3^2=2(x+1)

2x(x) + 1(x) - 9 = 2x + 2

2x^2 + x - 9 = 2x + 2

2x^2 + x - 2x = 2 + 9

2x^2 - x = 11

$2x^2-x=11\quad :\quad x=\frac{1+\sqrt{89}}{4},\:x=\frac{1-\sqrt{89}}{4}$