Question
Solve:
(2+x)(-sinx)
(2+x)(-sinx)
Answers
MathMate
(2+x)(-sinx)
is an expression, and cannot be solved.
To solve an <i>equation</i>, the expression must be equated to a value, such as
x²+2x+1=0
is an expression, and cannot be solved.
To solve an <i>equation</i>, the expression must be equated to a value, such as
x²+2x+1=0
Steve
so, assuming that you want to find x where
(2+x)(-sinx) = 0,
then you must have either
2+x = 0
or
-sinx = 0
I expect you can solve both of those.
This shows why we always set the product of factors equal to zero. If a product is zero, then at least one of the factors must be zero, since only multiplying by 0 gives a product of 0.
(2+x)(-sinx) = 0,
then you must have either
2+x = 0
or
-sinx = 0
I expect you can solve both of those.
This shows why we always set the product of factors equal to zero. If a product is zero, then at least one of the factors must be zero, since only multiplying by 0 gives a product of 0.