What's x^4-7x^2+1 ( factorize step-by-step)

I hope this helps you

ax^2+bx+c=0

disctirminant =b^2-4ax

x1,2=-b+- square root of disctirminant /2a

a=1 b=-7 c=1

disctirminant =(-7)^2-4.1.1

disctirminant =49-4=45

x1=-(-7)+square root of 45/2.1

x1=7+3 square root of 5/2

x2=-(-7)-square root of 45/2.1

x2=7-3 square root of 5/2

Number nine is f(x)= 40x : ) hoped i ya