Solve 6x^4-5x^2-4=0
Please include the steps so I can understand

|z| > (1/2) {-1/2, 1/2} {z|(-1/2) < z < (1/2)} {z|z < (-1/2) ∪ z > (1/2)}

Whoever gets this right gets the ! the half life of a soul smelling substance is 4 years. if you have 8 oz of this strange substance, how much of it will you have after 20 years? show work.

2x + 3y = 17 5x + 6y = 32 usibg method if elimination