Problem
(3) \( 4 x^{2}-36=0 \)
Solution
Step 1 ：\( 4x^{2} - 36 = 0 \)
Step 2 ：\( 4x^{2} = 36 \)
Step 3 ：\( x^{2} = 9 \)
Step 4 ：\( x = \pm\sqrt{9} \)
Step 5 ：\( x = \pm 3 \)
Step 1 ：\( 4x^{2} - 36 = 0 \)
Step 2 ：\( 4x^{2} = 36 \)
Step 3 ：\( x^{2} = 9 \)
Step 4 ：\( x = \pm\sqrt{9} \)
Step 5 ：\( x = \pm 3 \)
