0 = 0 is an identity and not an equation. Equations have solutions, identities do not.
x2 = 81 Square root both sides:- x = +/- 9
It has 2 solutions and they are x = 2 and y = 1 which are applicable to both equations
It has 2 real solutions because the discriminant is greater than zero.
It works out that the solutions are: x = 3 and y = 2
1 SOLUTION
It has two equal solutions for x which are x = 2 and x = 2
Infinitely many.
As many solutions as there are points in the domain.
1
None.
1
Infinitely many: they are the same line!
It has infinitely many solutions.
2x+y=3 is a line that has a -2 slope and 6x=9-3x is a vertical line. They will cross at one place. That is (1,2)
2x-3 = 9 2x = 9+3 2x = 12 x = 6
The quadratic equation will have two solutions.