Solve the following quadratic equation by completing the square.
x²+6x-7=0

Question

Solve the following quadratic equation by completing the square.
x²+6x-7=0

anonymous · Answer

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anonymous · Answer

add 7 to both sides 
$$x^2+6x=7$$take half of 6, which is 3, square it to get 9 and add to both sides, write 
$$(x+3)^2=7+9=16$$take the square root, don't forget the $\pm$ get 
$$x+3=4$$or $$x+3=-4$$ solve for $x$

anonymous · Answer

x=1 or x= -7