Question

CAN SOMEONE HELP ME WITH THESE QUESTIONS PLEASE!?

Answer 1

Explanation:

1.

`(c+9)^2=64=8^2\\`

c+9=±8

either c=8-9=-1

c=-8-9=-17

so c=-1,-17

D

2.

8x^2-3=2

8x^2=5

`x^2=(5)/(8)=(10)/(16)`

`x=±(√(10))/(4)`

so A

3.

`x^2+4x+4=18\\(x+2)^2=9*2\\x+2=3√(2) \\x=-2  ±3√(2)`

so D

or