Question

solve x^2+ 7x+3=0

Answer 1

x^2+7 x+3 = 0
Subtract 3 from both sides:
x^2+7 x = -3
Add 49/4 to both sides:
x^2+7 x+49/4 = 37/4
Factor the left hand side:
(x+7/2)^2 = 37/4
Take the square root of both sides:
sqrt(x+7/2)^2 = sqrt(37)/2
Eliminate the absolute value:
x+7/2 = -sqrt(37)/2 or x+7/2 = sqrt(37)/2
Subtract 7/2 from both sides:
x = 1/2 (-7-sqrt(37)) or x+7/2 = sqrt(37)/2
Subtract 7/2 from both sides:
x = 1/2 (-7-sqrt(37)) or x = 1/2 (-7+sqrt(37))

Answer 2

or use the quadratic formula

Answer 3

I have done- I got the answers -6.54 and -0.46. Are these right?

Answer 4

yeah

Answer 5

oh thanks