Question

Medal
Is -1 a solution of y^2 -1 = 4y + 3 ?

Answer 1

no its not if you substitute it you get

\[(-1)^2 - 1 = 4 \times (-1) + 3\]

Answer 2

to get a solution you need to rewrite the equation as

\[y^2 - 4y - 4 = 0\]

then to get a solution you will need the general quadratic formula

Answer 3

ohh i understand thank you so much