Question

What is the result of substituting for yin the bottom equation? y=x+3 y= x^2 + 2x - 4​

Answer 1

x +3 = x^2 +2x -4

Explanation:

Straight substitution of the top expression for y gives you ...

x +3 = x^2 +2x -4

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This lets you rewrite the equation to standard form as ...

x^2 +x -7 = 0

and find the solutions to be ...

x = (-1±√29)/2

Corresponding y-values will be 3 more than this:

y = (5±√29)/2