Quadratic Formula 2 (GCSE Higher Maths): Exam Qs 6

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  1. HEGARTYMATHS
  2. AQA
  3. Maths
  4. GCSE
  5. Unit 3
  6. Higher
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two ways. First is easiest - add 5 to both sides to get x^2 = 5 then take square roots to get x =+squreroot 5 and x =-squareroot5.

Or use quadratic formula with a -1, b=0 and c = -5

HEGARTYMATHS
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Great question again Liyah! It's because in this case b is not 5 as you say. b = -5. Therefore - - 5 (double negative as it were) is actually just 5.

HEGARTYMATHS
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Can you please do Unit 1 and 2 as well you're soo good at teaching.

welderq
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you awesome dude!!..i wish you were my maths teacher! thanks for this!! :D:D:D

thuvaraka
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I assumed that the - that came before the 4 in the formula will then make it a negative 4? Therefore it will be -4 x a x c?

LetsnotcryBoutit
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in question 1, why is -5 in brackets (to square) ?

libbyjspenny
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Soo wish you were my teacher.  are there any unit one and two revision ?
 

PointlessGinger
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For Qs 13(a) why does b=-7 and not just 7?

allemiranda
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This is so helpful but I got a question ( solve the equation x square -5 =0. give your answer to 1decimal place) I don't know how to do this one. Please help me. I wrote x square because no option to write 2 above x. SOrry) Please help I am waiting for your reply. Thank you.

husnahussain