[" Quel7-: find Arithmetic between "],[x^(2)+3xy" and "y^(2)-3xy']

Add 5x^(2)+3xy+2y^(2)" and "2y^(2)-xy+4x^(2)

Add x^2+y^2+3xy-6 and 2x^2-4y^2-xy+5

Subtract the sum of 7x^(2) - 4y^(2) " and " 4x^(2) + 3xy - 4y^(2) from the sum of 5x^(2) - 3xy - y^(2) "and " x^(2) + 2xy - 2y^(2) .

Multiply : 3x^(2) y - 7xy^(2) +2xy" by " 4xy

Find the angle between the straight lines represented by 2x^(2)+5xy+2y^(2)-5x-7y+3=0

If x=2+3i and y=2-3i then find the values of : (x^(2)+xy+y^(2))/(x^(2)-xy+y^(2))

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