Find the like terms in the following: `ax^2` y, 2x, `5y^2`, -`9x^2`,-6x, 7xy, `18y^2`.

Find the like terms in the following 9x^(2)y, 5x, 7y^(2), - 3x^(2), - 5x, 9xy, 11y^(2) .

Identify and write the like terms in each of the following groups : -2xy^2, x^2y, 5y^2x, x^2z

Find the number of terms in following algebraic expressions. 5xy^2 , 5xy^3 -9x, 3xy + 4y - 8, 9x^2 +2x+pq+q.

Find the number of terms in following algebraic expressions 2xy^(2), xy^(3) - 3x, 4xy + 6y - 2, 7x^(2) + x

Find the sum of the like terms : 7x^2y,-5x^2y

Identify and write the like terms in: -2xy^2,x^2y,5y^2x,x^2z

Group the like terms together : 12x, 12, 25x,-25, 25y, 1, x, 12y, y, 25xy, 5x^2y , 7 xy^2 , 2xy, 3xy^2 , 4x^2y

Find the radical centre of the following circles. x^2 + y^2 + 4x - 7 = 0 , 2x^2 + 2y^2 + 3x + 5y - 9 = 0 , x^2 + y^2 + y = 0 .

The arrangement of the following in ascending order of angle to eliminate xy term in the following equations (A) 2x^(2) + 5xy + 2y^(2) + 5x + 7y + 1= 0 (B) 2x^(2) - sqrt(3) xy + 3y^(2) = 9 (C) 9x^(2) + 2 sqrt(3) xy + 5y^(2) = 10

Find the equation of the radical axis of the following circles. x^2 + y^2 + 4x + 6y -7 = 0. 4(x^2 + y^2) + 8x + 12y - 9 = 0.