could someone help me with math?

Question

Solve the following equation for the indicated variable:

4a(5a-2)(4a+7)=0

 

a=

a=

a=

 

 

Answer 1

This equation has three zeroes.  To solve, you set each factor equal to zero and solve:

 

4a = 0

a = 0

 

5a - 2 = 0

5a = 2

a = 2/5

 

4a + 7 = 0

4a = -7

a = -7/4

 

These zeroes mean there are three x-intercepts on this graph, one at x = 0, one at x = 2/5, and one at x = -7/4.