How to do 12x31 in standard algorithm

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions.a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0

What is 100,000 times 1/100,000, using the standard method of multiplication? write the answer as 10 to a power.

What is the effect on the graph of the function f(x) = x2 when f(x) is changed to f(x) − 4?