Can someone help me with the last two questions of my test. they are in the images below. if they are correct i will mark as brainliest

Y=4x^2+x-1 solve using quadratic formula

Me find the value of x each figure.

The marked price of an article is 25% above its selling price and the cost price is 30% less than its marked price . find the discount percent and gain percent. only a brainlest can solve it i will mark you brainlest