Question

solve the equation giving your answer in correct to 2 decimal places 5x square+4x+1=3(1-3x)

Answer 1

Multiply out the term on the right, combine like terms, and use the quadratic formula (unless you can factor it).

5x^2 +4x +1 = -9x +3
5x^2 -13x -2 = 0

Now solve.

x = (1/10)[13 +/-sqrt(209)]

Answer 2

(a) ( x+1)2 =9

Answer 3

So are you using the quadratic formula?