if `9^x-4 (3^(x+2))+3^5=0` then solution pair is

Find the solution of the pair of equations : 2x+3y=9 3x+4y=5 .

Find the number of solutions for the pair of equations x + 3y + 5 =0 and - 3x - 9y + 2 =0.

Find the solutions of form x = a, y = 0 and x= 0, y= b for the following pairs of equations. Do they have any common such solution ? 2x+9y=18 and 3x-4y=24 .

If x^(4) + 4x^(3) - 2x^(2) - 12x + 9 = 0 has a pair of equal roots then the roots are

Solve the equation x^4 +4x^3 -2x^2 -12x +9=0 given that it has pairs of equal roots