Question

express (x^+8x-15) and (x^-8x-15) as the difference of two squares.​

Answer 1

Step-by-step explanation:

x^2+8x-15

=x^2+2.x.4+(4)^2-(4)^2-15

=(x+4)^2-16-15

=(x+4)^2-31

=(x+4)^2-(√31)^2

x^2-8x-15

=x^2-2.x.4+(4)^2-(4)^2-15

=(x-4)^2-16-15

=(x-4)^2-31

=(x-4)^2-(√31)^2