Question

If the slope of line l is x, and the slope of line m is x+2, and l⊥ m, what is x?

Answer 1

The answer to your question is: x = -1

Explanation:

Data

slope of l = x

slope of m = x +2

they are ⊥

Process

If they are ⊥, then, x + 2 = - 1/x

x(x + 2) = -1

x² + 2x = -1

x² + 2x + 1 = 0

(x + 1)² = 0

x + 1 = 0

x = -1