Answer:
-12 and -5
Step-by-step explanation:
a+b=-17
b-a=7
b=7+a
a+7+a=-17
2a+7=-17
2a=-17-7
2a=-24
a=-12
-12+b=-17
b=-17+12
b=-5
so a and b are -12 and -5 respectively
Option A
Option A -243
if any doubt leave a comment and don't forget to give BRAINLIEST
Answer:
id take it but don know how
Step-by-step explanation:
y= x^2 - 6x-7
Vertex = -b /2a
b= -6
a= 1
-(-6)/2(1)= 3
x= 3
Use the substitution method to find y
y= (3)^2-6(3)-7
(3)(3)-18-7
9-25
y= -16
Vertex is (3, 16)
Find x- intercept (y= 0)
y= x^2 - 6x-7
(x-7)(x+1)
x-7= 0
Move -7 to the other side. Sign changes from -7 to 7
x-7+7= 0+7
x= 7
x+1= 0
Move +1 to the other side. Sign changes from +1 to -1
x+1-1= 0-1
x= -1
Answer :B. Vertex: (3, -16); Intercepts: x=-1,7
