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Chemistry: Post your doubts here!
% error = 0.1/9 * 100 (0.05 for weighing more than 9.00 + 0.05 for weighing less than required) -
Maths, Addmaths and Statistics: Post your doubts here!
When k= 16, 4x^2 + 16x + 16 = 0 x^2 + 4x + 4 = 0 (x+2)(x+2)=0 x = -2 When k= -16, 4x^2 - 16x + 16 = 0 x^2 - 4x + 4 = 0 (x-2)(x-2)=0 x = 2- soumayya
- Post #4,876
- Forum: O-Levels / GCSEs / IGCSE
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Mathematics: Post your doubts here!
Since u got k = 2 , the eq: y = 2x^2 -3x +5 y = 5x-3 By equating (simultaneous eq): 2x^2 -3x +5 = 5x-3 2x^2 -3x -5x +5 +3 =0 2x^2 - 8x + 8 =0 2 (x^2 - 4x + 4) =0 2(x-2)(x-2) = 0 Hence, x= 2 When x=2 , y = 5(2) - 3 = 7 (2 , 7) -
Mathematics: Post your doubts here!
Ooops..sorry..didn't notice zat.. 4(x - 3/2)^2 - 6 = (2^2 *(x - 3/2)^2) - 6 = ( 2(x - 3/2) )^2 - 6 = (2x -3)^2 - 6 -
Mathematics: Post your doubts here!
y = 5x - 3 , y = kx^2 + 3x + 5 Equate both equations: kx^2 + 3x + 5 = 5x - 3 kx^2 + 3x - 5x + 5 + 3 = 0 kx^2 - 2x + 8 = 0 Tangent ---- b^2 -4ac =0 (-2)^2 - 4(k)(8) = 0 4 - 32k = 0 32k = 4 k = 1/8 -
Mathematics: Post your doubts here!
4x^2 -12x +3 = 4 (x^2 -3x ) +3 = 4 ( (x- 3/2)^2 - (3/2)^2 ) +3 = 4 ( (x- 3/2)^2 - 9/4 ) + 3 = 4 (x- 3/2)^2 - 9 + 3 = 4 (x- 3/2)^2 + 6 -
Mathematics: Post your doubts here!
Area = (22/360 x π r^2) + (22/360 x 2πrh) = (22/360 x π x 12^2) +( 22/360 x 2 x π x 12 x 7) -
Never give the evil a drive...he'll always want to ride...
Never give the evil a drive...he'll always want to ride...- soumayya
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Man's way leads to a hopeless end... Allah's way leads to an endless hope...
Man's way leads to a hopeless end... Allah's way leads to an endless hope...- soumayya
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