Answer quadratic equation in the simplest surd form/ exact from. 5-2x-x^2=0

5-2x-x2=0x2+2x-5=0 (moving everything over to the other side)then using the quadratic formula (to use a whiteboard during interview)a=1, b=2, c=-5x=(-2 +/- √(2^2 - 4x1x-5))/(2x1)x=(-2 +/- √(4+20))/2x=(-2 +/- √(24))/2... √24= √4 x √6 = 2 x √6x=(-2 +/- 2√6)/2x=2(-1 +/- √6)/2 (2 in the numerator and denominator cancel each other out)x= -1 +/- √6 there are usually 2 answers for a quadratic equation. Here the two answers would be reached by adding or subtracting the √6 from -1.

SO
Answered by Seun O. Maths tutor

3897 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

The point P has coordinates (3, 4) The point Q has coordinates (a, b) A line perpendicular to PQ is given by the equation 3x + 2y = 7 Find an expression for b in terms of a.


Solve the quadratic equation: x^2 - 2x - 15 = 0


Solve algebraically: 6x + y = 16, 5x - 2y = 19


Solve: 2x^2 + x = x^2 - 4(x+1)


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2026 by IXL Learning