12 If the sum of the zeroes of the polynonimal kx2+2x+3k is equal to their product, find the value of k. 13 If one of the zeroes of the polynomial f(x)=4x2-8kx-9 is negative of the find the value of k. 14 Obtain all others zeroes of 2x3+5x2-28x-15 if one of its zeroes is 3. 15 For what value of k, the polynomial x4-3x3+7x2-8x+k is exactly divisible by x2-x+3? 16 For what value of k will the the pair of equation kx+3y=k-3;12x+ky=k have no solution? 17 For which value of a and b will the pairs of linear equation have infinitely many solution? x+2y=1; (a-b)x+(a+b)y=a+b-2 18 Graphically solve the following pair of equations : 2x + y = 6 2x y + 2 = 0 – Find the ratio of the areas of the two triangle formed by the lines representing these equations with x axis and y axis. 19 find the value of x and y 43x + 67y = -24 ; 67x + 43y =24 20 What type of line do the following pair represent 5x+3y=2; 4x-3y=9 PROJECT: Do any one 1. History of Geometry 2. Pythagoras Theorem and its Geometrical Proof (three different methods) SCIENCE 1.(Project)Prepare a ppt OR Working model on any one of the following: (a)food and digestion in humans (b)respiration (c)Human heart ASSIGNMENT (TO BE DONE IN NOTE BOOK) CHEMISTRY
12 If the sum of the zeroes of the polynonimal kx2+2x+3k is equal to their product, find the value of k. 13 If one of the zeroes of the polynomial f(x)=4x2-8kx-9 is negative of the find the value of k. 14 Obtain all others zeroes of 2x3+5x2-28x-15 if one of its zeroes is 3. 15 For what value of k, the polynomial x4-3x3+7x2-8x+k is exactly divisible by x2-x+3? 16 For what value of k will the the pair of equation kx+3y=k-3;12x+ky=k have no solution? 17 For which value of a and b will the pairs of linear equation have infinitely many solution? x+2y=1; (a-b)x+(a+b)y=a+b-2 18 Graphically solve the following pair of equations : 2x + y = 6 2x – y + 2 = 0 Find the ratio of the areas of the two triangle formed by the lines representing these equations with x axis and y axis. 19 find the value of x and y 43x + 67y = -24 ; 67x + 43y =24 20 What type of line do the following pair represent 5x+3y=2; 4x-3y=9 PROJECT: Do any one 1. History of Geometry 2. Pythagoras Theorem and its Geometrical Proof (three different methods) SCIENCE 1.(Project)Prepare a ppt OR Working model on any one of the following: (a)food and digestion in humans (b)respiration (c)Human heart ASSIGNMENT (TO BE DONE IN NOTE BOOK) CHEMISTRY
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