hey your answrr of this question
[tex]{{x}^{2}\:+\:30 \:= \:1000 }[/tex]
[tex]{{x}^{2}\:+\:30 \:-\:1000\:= \:0 }[/tex]
[tex]{{x}^{2}\:+\:50x\:-\:20x \:-\:1000\:= \:0} [/tex]
[tex]{(x\:+\:50)\:-\:20(x \:+\:50)\:= \:0 }[/tex]
[tex]{(x\:-\:20)(x \:+\:50)\:= \:0 }[/tex]
x - 20 = 0. or x + 50 = 0
x = 20. or x = - 50
20 , -50 are the roots of the equation
most easy way
