Karteikarten
MATHS
Karten in diesem Stapel (3)
- 1"a" is always the number before the x(squared) term "b" is always the number before the x term "c" is always the number with no xquadratic equation example
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• 2x(squared) + 2x - 5 = 0
a= 2
b= 2
c= -5
• x = -2 +/- (square root) 2(squared) - 4 X 2 X -5
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2 X 2
SIMPLIFY
• -2 +/- (square root) 4 + 40
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4
SIMPLIFY
• -2 +/- (square root) 44
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4 - 2Factorising ------------- •Find 2 numbers that add to make the number without x and multiply to make the number with x •write the number in brackets •take both brackets and take off the brackets •make both equations equal to xexample
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• x(squared) - 8x + 15 = 0
• (x - 3) (x - 5) = 0
• x - 5 = 0 x - 3 = o
+5 +3
• x = 5 or x = 3 - 3complete the square -------------------- • make sure "a" = 1 (if not then make it 1) • bring "c" to the right side • add ( "b" ) (squared) -------------------- 2 • factorise • square root both sides • solve for xexample
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• x(squared) - 10x -2
• x(squared) - 10x = 2
• x(squared) - 10x + (10) (squared)
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2
= 2 + (10) (squared)
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2
simplify
• x(squared) - 10x +25 = 2 + 25
simplify
• x(squared) - 10x + 25 = 27
• (x - 5)(x - 5) = 27
• square root both sides
• x - 5 = +/- (square root) 27
Informationen
- Beschreibung
- FACTORISE | QUADRATIC EQUATIONS | COMPLETE THE SQUARE
- Erstellt von
- Riya Arif · Okt 2019
- Aktualisiert
- 5 Okt 2019
- Aufrufe
- 11
- Tags
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