Question

x*(x +38) = 215. пжжжжжжжжжжж​

Answer 1

Ответ:

$x_{1} = -43, x_{2} = 5$

Пошаговое объяснение:

• $x (x + 38) = 215$
• $x^{2} + 38x = 215$
• $x^{2} + 38x - 215 = 0$

• $x^{2} +43x - 5x - 215 = 0$
• $x(x+43) - 5 (x+43) = 0$
• $(x +43)(x-5) = 0$
• $\left \{ {{x + 43=0} \atop {x-5=0}} \right.$
• $\left \{ {{x=-43} \atop {x=5}} \right.$
• $x_{1} = -43, x_{2} = 5$