Step-by-step explanation:

Answer:
12.30
Step-by-step explanation:
82*.15=12.30
<span>5 × 23 × 2 = 5 × 2 × 23 = 10 × 23 = 230</span>
Divide both sides by 2
x^2 = 128/2
Simplify 128/2 to 64
x^2 = 64
Take the square root of both sides;
x = √64
Since 8 * 8 = 64, the square root of 64 is 8
<em>x = -8 and 8</em>
<u>Answer: B -8 and 8</u>