Question

y=x^2-2x-1
y=x+3
determine the common solution of these equations.

Answer 1

4

Answer 2

How do you figure that out? @mz_samosino

Answer 3

x^2-2x-1 = x + 3
x^2 -2x -x 1 -3 =0
factors: (x-4) (x+1)
4,-1
there are two
but if you substitute them
in both equation the only solution is 4

Answer 4

Could you please solve the solution for this question? @mz_samosino

Answer 5

subsitute the value of your y (2nd equation) in the y of 1st equation

Answer 6

then cross multiply