Question

Find the value of the expression 7y−9y2+8−3y+13y2−4 by substituting y=1/2

Answer 1

Step-by-step explanation:

see the attachment. ...

Answer 2

Answer:

4.75

Step-by-step explanation:

7/2-9/2+8-3/2+13/4(13x1/4 as 1/2 ^ 2 = 1/4)-4

3.5-4.5+8-1.5+3.25-4

and we get 4.75 as the answer