Asked by iris
Solve the equation: there are 2 solutions for x.
-3/x=x/-3 also
x/3=4/x+1
thank you much
-3/x=x/-3 also
x/3=4/x+1
thank you much
Answers
Answered by
Henry
-3/X = X/-3.
Cross multiply:
x^2 = 9,
Take the sqrt of both sides:
x = +- 3.
x/3 = 4/(x + 1),
Cross multiply:
x^2 + x = 12,
x^2 + x - 12 = 0,
(x - 3) (x + 4) = 0,
x - 3 = 0, x = 3.
x + 4 = 0, x = -4.
Cross multiply:
x^2 = 9,
Take the sqrt of both sides:
x = +- 3.
x/3 = 4/(x + 1),
Cross multiply:
x^2 + x = 12,
x^2 + x - 12 = 0,
(x - 3) (x + 4) = 0,
x - 3 = 0, x = 3.
x + 4 = 0, x = -4.