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10 Cards in this Set
- Front
- Back
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Simplifying expressions 2x+5y+5x+9y-2x= |
(2x+5x-2x)+(5y+9y) 5x+14y |
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Indices x^2 x x^6= x^9 / x^4 = (16^3/2)^3/2 |
x^2 x x^6 = x^8 x^9 / x^4 = x^5 (16^3/2)^3/2 --> 16^9/4 --> 2^9= 512 |
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Expanding and factorising 4(x+2) 49x+70 |
4x+8 7(7x+10) |
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Surds (root)80+(root)45+(root)20 Rationalise the denominator |
4(root)5+3(root)5+2(root)5= 9(root)5 RTD: Times both sides by root or reciprocal equation in the bottom and simplyfy |
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Plotting graphs |
Work out points, accurate axies, plot properly |
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Quadratic factorisation X^2+ 3X +2 |
(x+2)(x+1) Times together to make integer but add together to make the singular x value |
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Completing the square x^2+6x+16 |
(x+3)^2 -9+16=0 (x+3)^2 +7=0 (x+3)^2=-7 x+3= (root)7 X= -3+(root)7 or -3-(root)7 |
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Sketching quadratic curves |
Find points, accurate axies, freehand curve |
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Linear simultaneous equations - elimination method 6x+2y=18 6x-2y=30 |
Label both sums, eliminate the y's by adding them together. 12x=48 therefore x=4. Substitute this in to the first equation. 6*4 +2y=18 therefore 2y=-6 and y=-3 |
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Linear simultaneous equations - substitution method 3y+2x=26 4y+4x=40 |
Label them then instead of getting rid of one of the terms, rearrange one of the equations to find what one of the letters equal. Then substitute into the second, expand simplyfy and find the terms through this and substitution |
