Question

solve by completing the square x²-4x-1=0​

Answer 1

$\bold \pink{ANSWER}$

• Add 1 to both sides of the equation. Force a perfect square trinomial on the left side by dividing the coefficient of the x term and squaring the result. Add it to both sides of the equation. We now have a perfect square trinomial on the left side in the form a2+2ab+b2=(a+b)2 , where a=x, and b=2 .