Question

V) x2 + 4x +1=0 by completing the square method
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Answer 1

Answer:

Solve the quadratic equation x^2 + 4x +1 = 0 by completing the square. The first step is to divide the coefficient of x by 2, and add this to x (this is our value of 'a' to go inside our bracket). We then square this value of a and subtract it outside the bracket. We have our equation in completed square form.

Answer 2

Answer:

X2+4x+1=0, X2+2×2x+1= 0,(x+1)2=0, (x+1)(x-1)=0, zeros are x=-1 and 1