-7
2x2-y2
it equals 54.
15x9=135
-2 plus 5 equals +3
the square root (abbreviated: sqrt) of x9 can be written like this: sqrt(x9) = (x9)(1/2) = x[9*(1/2)] = x(9/2)
You can't. You need 2 equations to solve for 2 unknowns
You cannot solve it since it is not a true equation.
divide 20 by 10 which equals 2 the times 2 by 2 which equals 4
22
2y = 4 (divide both sides by 2 to solve) y = 2
3
3