Question

I am having trouble with completing a square, please walk me through for this problem...
2x^2+5x-2=0

Answer 1

I believe he said to "walk him through" the steps, not post ALL of the steps.

Answer 2

My apologies. I'll... fix it.

Answer 3

start by dividing every term by 2

x^2 + 5/2 x - 1 = 0

add 1 to both sides

x^2 + 5/2x = 1

for a quadratic x^2 + bx + c
then you need to calculate (b/2)^2

this will be (5/2/2)^2 = (5/4)^2

this term is then added to both sides of the equation

x^2 + 5/2 x + (5/4)^2 = 1 + (5/4)^2

left hand side is a perfect square

(x + 5/4)^2 = 1 + 25/16

(x + 5/4)^2 = 41/16

Answer 4

You would like to have $22,000 in 4 years by making regular deposits at the end of every three months in an annuity that pays 3.75% compounded quarterly. How much of the $22,000 comes from interest? Round your answer to the nearest dollar.