Question

7 (x - 3) – 5(x2 – 1) = x2 - 5( x + 2)
Resolver con la fórmula general
Si me ayudan paso pack ;v
Okey no xd
Solo ayúdenme T^T

Answer 1

Respuesta:

$7x - 3x - 5x {}^{2} + 5 = x {}^{2} - 5x - 10 \\ 6x {}^{2} - 9x - 15 = 0 \\ aplicando \: la \: formula \: general \: = \\ x = \frac{ - ( - 9) + - \sqrt{ (- 9) {}^{2} - 4(6)( - 15)} }{2(6)} \\ x = \frac{9 + - \sqrt{441} }{12} \\ x = \frac{9 + - 21}{12} \\ \\ x1 = \frac{9 + 21}{12} \\ x1 = \frac{30}{12} = 2.5 \\ \\ x2 = \frac{9 - 21}{12} \\ x2 = \frac{ - 12}{12} = - 1$

Answer 2

Respuesta:

4.- y=x²-2x+3

2(x²)+3

4+3=7