Question

21.(a)Let x = p4× q2, y = p × q4thenfind HCF (x, y) and LCM (x , y)

(b)Find the largest positive integer that will divide398, 436 and 542 leaving remainders 7,11 and 15 respectively.

22.(a)Which of the following is not the graphof a quadratic polynomial?

(b) Find the zeroes of the4x2– 4x – 8and verifythe relationship between the zeroes andthe coefficients

23.A fraction becomes 9/11 , if 2 is added to boththe numerator and the denominator. If, 3 isadded to both the numerator and the denominator itbecomes 5/6 . Find the fraction.orA two digit number is seven times the sum of its digits.The number formed by reversingthe digits is 18 less than the given number. Findthe given number.

24.Prove that√5 is irrational and henceprovethat 3+ 2√5 is an irrational number.

25.Verify that the numbers given alongside the cubicpolynomial below are their zeros. Alsoverify the relationship between the zerosand the coefficients.x3– 4x2+ 5x – 2; 2,1,1.orIf the polynomial (x4+ 2x3+ 8x2+ 12x + 18) is dividedby another polynomial (x2+ 5), theremainder comes out to be (px +q). Find values ofp and q.

26.Speed of a boat in still water is 15 km/h. Itgoes 30 km upstream and returns back at thesame point in 4 hours 30 minutes. Find the speed ofthe stream.III.SOLVE THE FOLLOWING:1Q x 5M = 5M27.Check whether the pair of equations x + 3y= 6 and 2x – 3y = 12 is consistent. If so, solvethem graphically. ( GRAPH PAPER )orObtain all other zeros of 3x4+ 6x3– 2x2– 10x –5, if two of its zeros are+and -5353

Answer 1

Answer:

Nahi pata sorry for disturbing to ask. ok