I need help on this question im strugling​

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

How many real-number solutions does the equation have? -4x^2 + 10x + 6 = 0 a. no solutions b. two solutions c. infinitely many solutions d. one solution

Which is greater, 7 p 5 or 7 c 5? 7p5 7c5