Question

CAN SOMEONE HELP ME WITH THESE QUESTIONS PLEASE!?

Answer 1

Answer:

Step-by-step 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

$x^2=\frac{5}{8}=\frac{10}{16}$

$x=±\frac{\sqrt{10}}{4}$

so A

3.

$x^2+4x+4=18\\(x+2)^2=9*2\\x+2=3\sqrt{2} \\x=-2 ±3\sqrt{2}$

so D

or