Hey there.. Lets solve this problem step by step
Given problem --> 5x² - 45 = 0
Step 1 - adding both sides by 45
5x² - 45 + 45 = 0 + 45
5x² = 45
Step 2 - dividing both sides by 5
\(\frac{5}{5} x^2 = \frac{45}{5}\)
x² = 9
Step 3 - taking square root on both sides to find the value of x
√x² = √9
x = 3 and -3
So correct option is D.
Hope this helps you.. :)
