13.) 2x^2- 13 = 2x - ---- -- (15.) 2x^2 +16 x=3?

Question

please help
solve by compeleting the square. round your answer to the nearest tenth, if necessary?

Answer 1

2x^2-2x-13=0
x^2-x - 6.5=0
x^2 -x +1/4 -6.5 = 1/4
(x-1/2)^2 = 6.75

2x^2 +16x = 3
x^2+ 8x=3/2
x^2+8x +16= 16 +3/2
(x+4)^2= 17.5

Answer 2

here

2x^2-13+2x=0
2x^2+2x-13=0
2(x^2+x)=13
2(x^2+x+.25)=13-.5
2(x+.5)^2=12.5

2(x^2+8x)=3
2(x^2+8x+16)=3-32
2(x+4)^2=-29