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

3902 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Rectangle A has a length of 3y cm and a width of 2x cm. Rectangle B has a length of (y + 4)cm and a width of (x + 6)cm. Rectangle A has a perimeter of 94cm and Rectangle B has a perimeter of 56cm. Solve x and y and calculate the areas of each rectangle.


Make x the subject of the formula 3(2x – y) = ax – 4


Solve the Simultaneous Equations -3X + 4Y=11 & X-2Y = -5 to find the values of X and Y


How should I go about factorising x^2+5x+6?


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