Question

2x^(2)+12x+8
using completing square

Answer 1

`{2x}^(2) + 12x + 8 \\ = {x}^(2) + 6x + 4 \\ = {x}^(2) + 6x + {( (6)/(2)) }^(2) + 4 - {( (6)/(2) )}^(2) \\ = ( {x}^(2) + 6x + {3}^(2) ) + ( - 5) \\ = {(x + 3)}^(2) - 5`