Question

a) y = -3x + 6 b) y = x2 + 2x – 8 c) y = -x2 + 6x - 9

Answer 1

Resposta:

a) x = 2

b )y = (x + 1)^2 - 9

c) y = - (x - 3)^2

Explicação passo-a-passo:

a)  y = -3x + 6

0 = - 3x + 6

3x = 6

x= 2

b) y = x2 + 2x – 8

y + 1 = x^2 + 2^32 + 2x + 1 - 8

y + 1 = (x + 1)^2 - 8

y = (x + 1)^2 - 8 - 1

y = (x + 1)^2 - 9

c) y = -x2 + 6x - 9

y - 9 = - x^2 + 6x - 9 -9

y - 9 = - (x^2 + 6x + 9) -9

y - 9 = - (x - 3)^2 - 9

y = - (x - 3)^2 - 9 + 9

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

y = - (x - 3)^2