Write the quadratic equation 7 – 4x – x2 = 0 in standard form ax2 + bx + c = 0.

Soln:

The given quadratic equation is 7 – 4x – x2 = 0

∴ x2 +4x – 7 = 0 is the standard form of ax2 + bx + c = 0.

∴  The standard form of the given equation is

∴ x2 +4x – 7 = 0