Question

Y = -2x2 + 10 y = -2x – 2

Answer 1

Explanation:

hello :

y = -2x² + 10

y = -2x – 2

-2x²+10 = -2x-2

2x²-2x -12 = 0

x²-x-6 = 0

(x-3)(x+2)=0

x-3=0 or x+2=0

x=3 or x=-2

but y = -2x-2

if ; x=3 y = -2(3)-2 =-8

if : x=-2 y=-2(-2)-2=2

two solutions : (3 , -8) and (-2 , 2)

Answer 2

x = 6

y = - 14

Explanation:

`\left \{y=-2x2 + 10y} \atop {y=-2x -2}} \right.`

1. -2x × 2 + 10 = - 2x - 2
2. x = 6
3. y = -2 × 6 - 2 = - 14