Question

Please help me with this.

Answer 1

Answer:

1) &3)

Step-by-step explanation:

quadratic equations are the equation with the degree of 2

solving each expression we get

1)$x^{2} -5x-4=0$

2)$x=4$

3)

$x=(5x-2)^{2} \\x=25x^{2} +4-20x\\25x^{2} +4-21x=0$

4)$x^{4}=x^{2} +3$