9v2 - 4 = 0
Add 4 to both sides 9v2 = 4
Take square roots of both sides: ±3v = ±2
so that v = ±2/3
Solve this problem -x squared -40x- 80 =0
y = 3, 6
If: 12-7n2 = 0 Then: n = square root of 12/7
2sinx+1 equals 0
100t -16t2 = 0 t4(25-4t) = 0 t = 0 or t = 25/4
For y - 2y - 3y equals 0, y equals 0.
many solutions
"x equals 0" is an equality, not an inequality. The question is, therefore, not consistent.
x: x2 - 81 = 0
Suppose x3-4x = 0. To solve, factor: x3-4x = x(x2-4) = x(x+2)(x-2) = 0 Now, a product equals 0 if and only one or more of the factors equals 0, so set each factor to 0 and solve. The roots are 0,-2 and +2.
x=2
10x=x 9x=0 x=0