Question

СУПЕРГЕРОИ ПОМОГИТЕ !!!!!​

Answer 1

Ответ:

Пошаговое объяснение:

$x^{2} +4x-5=0\\D = 4^{2} - 4 * (-5)=36\\x_{1,2} = \frac{-4+-\sqrt{36} }{2} \\x_{1} = -5\\x_{2} = 1$

$x^{2} +4x-12=0\\D = 4^{2} - 4*(-12) = 64\\x_{1,2} =\frac{-4+-\sqrt{64} }{2}\\x_{1} = -6\\x_{2}=2$

$x^{2} +2x-15=0\\D=2^{2}-4*(-15)=64\\x_{1,2} =\frac{-2+-\sqrt{64} }{2} \\x_{1} =-5\\x_{2} =3$

$x^{2} -10x+16=0\\D=(-10)^{2}-4*16=36\\x_{1,2}=\frac{10+-\sqrt{36} }{2}\\x_{1} =2\\x_{2} =8$

$x^{2} -6x+3=0\\D =(-6)^{2} -4*3=24=\sqrt{6*4} =2\sqrt{6} \\x_{1,2}=\frac{6+-2\sqrt{6} }{2} \\x_{1} =\frac{6-2\sqrt{6} }{2} 3-\sqrt{6} \\x_{2} =\frac{6+2\sqrt{6} }{2} 3+\sqrt{6}$