Answer:
Choice a is correct answer.
Step-by-step explanation:
Given equation is:
2x² = 72
We have to find the value of x.
Multiplying by 1/2 to both sides of above equation,we get
1/2(2x²) = 1/2(72)
x² = 36
Taking square root to both sides of above equation, we get
√x² = √36
As 36 is square of ±6,hence
x = √(±6)²
x = ±6 which is the answer.
