Question

calculati x la patrat+5x-14=0

Answer 1

x²+5x-14=0

x²+7x-2x-14=0

x(x+7)-2(x+7)=0

(x+7)(x-2)=0

x+7=0

x+7-7=0-7

x=0-7

x=-7

x-2=0

x-2+2=0+2

x=0+2

x=2

S={-7,2}

Answer 2

$x^{2} + 5x - 14 = 0 \\ {x}^{2} + 7x - 2x - 14 =0 \\ x(x + 7) - 2(x + 7) = 0 \\ (x + 7)(x - 2) = 0$

Ecuatia are doua solutii:

1)

$x + 7 = 0 \\ x = - 7$

2)

$x - 2 = 0 \\ x = 2$

S={-7, 2}