Respuesta :

Melody08

Answer:

x=5, y=-10

Step-by-step explanation:

y = x²-10x+15 --- eqn 1

y = -10 --- eqn 2

Sub eqn 2 into eqn 1:

     x²-10x+15 = -10

x²-10x+15+10 = 0

    x²-10x+25 = 0

            (x-5)² = 0

                x-5 = 0

                    x = 5