Question

Find the zeros of the function. y=1/2(2x+5)(x+4)

I think the answers are X=-2.5 and X=-4 but I'm not sure about the -2.5 Pls Help​

Answer 1

x = - 2.5, x = - 4

Explanation:

To find the zeros, set y = 0, that is

`(1)/(2)`(2x + 5)(x + 4) = 0

Equate each of the factors to zero and solve for x

2x + 5 = 0 ⇒ 2x = - 5 ⇒ x = - 2.5

x + 4 = 0 ⇒ x = - 4

Answer 2

0=1/2(2x²+13x+20)

0=x²+6,5x+10

`x = ( - 6.5 + √(2.25) )/(2) \\ x = - 2.5 \\ x = - 4`