Set all numbers and variables equal to zero. (2x3)-(3x2)-(20x)-21=0
Next, follow the order of p.e.m.d.a.s.
6-6-20x-21=0
-20x-21=0
Separate the numbers and variables
-20x=21
x= -21/20
Chat with our AI personalities
2sinx+1 equals 0
For y - 2y - 3y equals 0, y equals 0.
"x equals 0" is an equality, not an inequality. The question is, therefore, not consistent.
many solutions
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.