Question

How do I solve by factoring x^4-50x^2+49=0

Answer 1

(X^2-1)(x^2-49)
So for the first one take
X^2=1
X=1
The second
X^2=49
X=7
X=7,1

Answer 2

$(x^2-49)(x^2-1) = (x-7)(x+7)(x-1)(x+1) = 0, so x = 7, x = -7, x = 1, x = -1.$