Thread: any easy method

If x(x+4)(2x-15)(x-1)(x+2) = 0, then what is the product of maximum and minimum value of x?


I could find it by multiplying all and finding the root but i there a easy way to find the roots or multiply between brackets ..or by seeing this equation can i deduce that 0 is min value so product will be zero ..my main question is how to find the max and min of a given equation

If I have understood the question correctly,

If x(x+4)(2x-15)(x-1)(x+2)=0

The values of x satisfying the equation are clearly 0,-4,1,15/2 and -2

The lowest value of x is thus =-4
and the maximum value turns out to be 15/2

Their product will be -30?

I'm not sure if I understand the question correctly but if I do you set each factor equal to 0. So x= -4,-2,0,1,7.5. Now just multiply highest and lowest value.