Show work ! solve the equation by completing the square. if necessary, round to the nearest hundredth.
x^2-18x=19

a. 1; 19
b.-1; 19
c.3; 6
d.-3; 1

solve x^2-81=0

a.0
b.-9
c.-9,9
d.9

1. B 2. C

Step-by-step explanation:

1. x^2-18x+(18/2)^2=19+(18/2)^2

(x-18/2)^2=100

(x-9)^2=100

x1= -1 x2= 19

2. x^2=81

x=+-9

x1=-9 x2=9

answer:

(-8,7)

explanation:

we know that  

f

(

−

3

)

=

7

therefore, if we wish to get the output as 7, in the function, we need to have our input to be -3.

looking at the function  

f

(

x

+

5

)

, what should the value of x be, such that the input in the function becomes 7?

we simply equate the terms,

x

+

5

=

−

3

x

=

−

8

thus, the point on the new function would be  

(

−

8

,

7

)

x = -2

y = 848

step-by-step explanation:

plug in the numbers