Equations (Quadratics)

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  • Created by: Madisonxo
  • Created on: 08-05-16 14:35
What do the numbers in a quadratic factorisation add and multiply to make? (a)x²-(b)x+(c)=0
Add to make (b) and multiply to make (c).
1 of 10
Factorise the quadratic: x²-9x+20=0
(x-4)(x-5)=0
2 of 10
What does x= in the factorised quadratic: (x-10)(x+1) ?
x=10 and x=-1
3 of 10
What do you do if you have to work out this harder quadratic? 6x²-5x-6
6x-6=-36. This shows that we want two numbers that multiply to -36 and add to make -5.
4 of 10
Complete the quadratic: 6x²-5x-6.
(6) x (-6)=-36. 6x²-9x+4x-6. 3x(2x-3)+2(2x-3). (3x+2)(2x-3). CHECK.
5 of 10
Complete the quadratic: 3x²-4x-15
(3) x (-15) =-45. 3x²-9x+5x-15. 3x(x-3)+5(x-3). (3x+5)(x-3).
6 of 10
How to do : sinx=1/2
x=sin^-1(1/2). =30°. (draw graph) x=30° x=150°
7 of 10
Complete the quadratic: 6x²-7x-3=0
6x²-9x+2x-3=0. 3x(2x-3)+1(2x-3)=0. (3x+1)(2x-3)=0. x=1/3. x=3/2.
8 of 10
Name the methods for drawing a quadratic graph.
Table of values. Calculator. Algebra.
9 of 10
What is the quadratic formula?
x=-b±√b²-4ac/2a
10 of 10

Other cards in this set

Card 2

Front

Factorise the quadratic: x²-9x+20=0

Back

(x-4)(x-5)=0

Card 3

Front

What does x= in the factorised quadratic: (x-10)(x+1) ?

Back

Preview of the front of card 3

Card 4

Front

What do you do if you have to work out this harder quadratic? 6x²-5x-6

Back

Preview of the front of card 4

Card 5

Front

Complete the quadratic: 6x²-5x-6.

Back

Preview of the front of card 5
View more cards

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