Question

Q1] SOLVE THE FOLLOWING.


a) x + 2y = -6 and x = 2, then y =?

b) D = 10, Dx = 5 and Dy = 2, then x=?

c) Write general form of Linear eqns. in 2 variables

d) Write the formula to find nth term of an A.P

e) Write the formula for finding the sum of the n terms of an A.P

f) Write next 2 terms of sequence 1, 8, 27,…

g) Determine whether x² + 3= x(x + 3) is quadratic eqn. or not.

h) Write the values of a, b, c in eqn. y² - 5y – 6 = 0

i) Write the formula for finding roots of Quadratic eqn.

j) Find x, if x(2x – 1) = 0


Q2] SOLVE THE FOLLOWING.


a) If 12x + 13y = 10 and 13x + 12y = 15, then find the value of (x + y)

. b) Find the value of Dx and Dy for x + 2y = 1 ; 2x + y = 3.

c) Sum of two natural numbers is 18 and their difference is 2. Find the numbers

d) Write (2x + 5)² = x – 2 in form ax² +bx +c = 0

e) For quadratic equation 9x² - 12x + 4 =0, find b² - 4ac.​

Answer 1

Answer:

1 A - 8, B - 5, J - 1 और नहीं pata