Thread: quadratic equation

Solve the following quadratic equation by implementing the formula method.
Answer to 3 significant figures
Can you Show each step to the solution please.
5x2 + 5x – 4x2 + 2x= 20

The standard form of the quadratic equation is
Ax2 + bx + c = 0

5x2 + 5x – 4x2 + 2x= 20
Write this in the standard form.
Then x = [-b + or - sqrt( b^2 - 4ac)]/2a.
Now solve.

how should i solve it, can you run through it please. am really confused with it.

Originally Posted by Jay1001

how should i solve it, can you run through it please. am really confused with it.

Collect x^2 and x terms together and bring the constant term to the left side and write down the equation which equals to zero.
Identify coefficients of x^2 and x and hence a, b and c.
Substitute them in the standard formula to find x