How to solve the problem 378times 6using place value with regrouping explain how you knew when to regroup

What expression is equivalent to (2x-1)(x-3)?

If square root x = -7, then x= -49 true or false

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