0
x = (-b (+/-) root( b2 - 4ac)) / 2a
Sorry about the messy answer, there are no square root symbols or plus-minus symbols.
Here is the proof -
ax2 + bx + c = 0 --------> multiply by 4a
4a2x2 + 4abx + 4ac = 0
4a2x2 + 4abx = -4ac ----------> add b2 to both sides
4a2x2 + 4abx + b2 = b2 - 4ac -----------> factorise LHS
(2ax + b)2 = b2 - 4ac
2ax + b = (+/-) root( b2 - 4ac)
2ax = -b (+/-) root( b2 - 4ac)
x = (-b (+/-) root( b2 - 4ac)) / 2a
Maths works people.
Still curious? Ask our experts.
Chat with our AI personalities
Blake
Beau
ProfessorAdd your answer:
Earn +20 pts
What is the answer to A plus B plus C equals A times B equals C?
A=0 b=0 c=0
How do you apply Pythagoras theorem?
you use A squared plus B squared equals C squared
Assuming A squared plus b squared equals c squared and a equals 10 and b equals 30 what is c?
C equals the square root of 1000 or 31.622776601683793319988935444327...
What is the answer to A squared plus B squared equals 25?
2.5 + 3.4 Pythagorean Theorem?
What is the diagonal of a 30-inch square box?
'A' squared plus 'B' squared equals 'C' squared. If 'A' and 'B' are the legs of the right angle comprising the sides of the box, 30 inches squared (900) plus 30 inches squared (900) equals 1800. The square root of 1800 is 42.426408711929.
