Find the value of `x^2-y+2` if x=0 and y=-1

Find the value of: x^2+y , For x=-1 and y=1 .

Find the value of: xy+y^2x , for x=-1 and y=1

Find the value of xy+y^2x if x=1, y=0

If [{:(x-1," "2,5-y),(" "0,z-1,7),(" "1," "0,a-5):}]=[{:(1,2,3),(0,4,7),(1,0,0):}] then find the values of x , y z and a .

Find the values of x, y, z if the matrix A=[(0, 2y,z),(x,y,-z),(x,-y,z)] satisfy the equation A'A=I .

Find the value of K if the lines x+y-5=0 and 2x+ky-8=0 are conjugate with respect to the circle x^(2)+y^(2)-2x-2y-1=0

Find the value of k if 4x+y+k=0 is a tangent to the ellipse x^2+3y^2=3 .

Find the value of k if x + y - 5 = 0 2x + ky - 8 = 0 are conjugate with respect to the circle x^(2) + y^(2) - 2x - 2y -1 = 0

Find the value of k if kx+ 3y - 1 = 0, 2x + y + 5 = 0 are conjugate lines with respect to the circle x^(2) + y^(2) - 2x - 4y - 4 =0 .