Find the sum of: `7x^2y and -6x^2y`

Subtract the sum of x^2-5xy+2y^2 and y^2-2xy-3x^2 from the sum of 6x^2-8xy-y^2 and 2xy-2y^2-x^2

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

Find the equation of the radical axis of the circles represented by 2x^2+2y^2+3x+6y-5=0 and 3x^2+3y^2-7x+8y-11=0

Find the image of the point (-2, -7) under transformation (x, y) to (x - 2y, - 3x + y)

Find the value of k if the line 2y=5x+k is a tangent to the parabola y^(2)=6x

Find the equation of the radical axis of the following circles. x^2 + y^2 - 3x - 4y + 5 = 0. 3(x^2 + y^2) - 7x + 8y - 11 = 0

Find the equation of the radical axis of the following circles x^(2)+y^(2)-3x-4y+5=0,3(x^(2)+y^(2))-7x+8y-11=0

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