Question

For what value of x:

is the square of the binomial x+1 twenty greater than the square of the binomial x–3?

Answer 1

x = 3.5

Explanation:

(x^2 +2x +1) -(x^2 -6x +9) = 20

.. 8x -8 = 20

.. x = 28/8 = 3.5