Question

Complete the square of 2x2+8x-168=0

Answer 1

2×2+8x=168

4+8x=168

8x=168-4

8x=164

x=164/8

x=20.5

Answer 2

2×2+8x-168=0

4+8x=168

8x=168-4

8x=164

X=164/8

X=41/2