How do you simplify the expression #7x^2-4y+3x^2+5y+2# and evaluate it for x+3 and y=9?
Assuming this is all equal to 0, we add like terms
We can then isolate one of the variables, usually
To evaluate it for
To solve for
We can use the quadratic formula to get the solutions
This results in undefined so there are no real solutions.
This is also undefined, so there are no real solutions.